题目内容
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According to Dr. David, Americans ______.
A．are ideally vigorous even under the pressure of life
B．often neglect the consequences of sleep deficit
C．do not know how to relax themselves properly
D．can get by on 6. 5 hours of sleep
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更多“According to Dr. David, Americ…”相关的问题
According to Dr. David, Americans ______.
A．are ideally vigorous even under the pressure of life
B．often neglect the consequences of sleep deficit
C．do not know how to relax themselves properly
D．can get by on 6.5 hours of sleep
However, there was some decline in their psychomotor speed. This means that it took them longer to accomplish mental tasks than it used to. But when speed was not a factor, they lost very little intellectual ability over the years. In general Dr. Jarvik's studies have shown that there is no decline in knowledge or reasoning ability. This is true not only with those in their 30's and 40's, but with those in their 60's and 70's as well. In the cases where the older person's mind really seems to decay, it is not necessarily a sign of decay due to old age. Often it is simply a sign of a depressed emotional state.
According to Dr. Jarvik's studies, middle-aged and older persons would expect to ______.
A．remember less
B．reason better
C．learn fewer things
D．lose no intellectual ability
根据下列文章，回答21～25题。
While still catching-up to men in some spheres of modern life, women appear to be way ahead in at least one undesirable category. Women are particularly susceptible to developing depression and anxiety disorders in response to stress compared to men, according to Dr. Yehuda, chief psychiatrist at New York''s Veteran''s Administration Hospital.
Studies of both animals and humans have shown that sex hormones somehow affects the stress response, causing females under stress to produce more of the trigger chemicals than do males under the same conditions. In several of the studies, when stressed-out female rats had their ovaries （the female reproductive organs） removed, their chemical responses became equal to those of the males.
Adding to a woman''s increased dose of stress chemicals, are her increased opportunities for stress. It''s not necessarily that women don''t cope as well. It''s just that they have so much more to cope with, says Dr. Yehuda. Their capacity for tolerating stress may even be greater than men''s, she observes, It''s just that they''re dealing with so many more things that they become worn out from it more visibly and sooner.
Dr. Yehuda notes another difference between the sexes. I think that the kinds of things that women are exposed to tend to be in more of a chronic or repeated nature. Men go to war and are exposed to combat stress. Men are exposed to more acts of random physical violence. The kinds of interpersonal violence that women are exposed to tend to be in domestic situations, by, unfortunately, parents or other family numbers, and they tend not to be one-shot deals. The wear-and-tear that comes from these longer relationships can be quite devastating.
Adeline Alvarez married at 18 and gave birth to a son, but wad determined to finish college. I struggled a lot to get the college degree. I was living in so much frustration that that was my escape, to go to school, and get ahead and do better. Later her marriage ended and she became a single mother. It''s the hardest thing to take care of a teenager, have a job, pay the rent, pay the car payment, and pay the debt. I lived from paycheck to paycheck.
Not everyone experiences the kinds of severe chronic stresses Alvarez describes. But most women today are coping with a lot of obligations, with few breaks, and feeling the strain. Alvarez''s experience demonstrates the importance of finding ways to diffuse stress before it threatens your health and your ability to function.
第 21 题 Which of the following is true according to the first two paragraphs？
A．Women are biologically more vulnerable to stress.
B．Women are still suffering much stress caused by men.
C．Women are more experienced than men in coping with stress.
D．Men and women show different inclinations when faced with stress.
The orthodox view of human handedness is that it is connected to the bilateral specialisation of the brain that has concentrated language-processing functions on the left side of that organ. Because, long ago in the evolutionary past, an ancestor of humans underwent a contortion that twisted its head around 180°relative to its body, the left side of the brain controls the fight side of the body, and vice versa. In humans, the left brain is usually dominant. And on average, left-handers are smaller and lighter than right-handers. That should put them at an evolutionary disadvantage. Sporting advantage notwithstanding, therefore, the existence of left-handedness poses a problem for biologists. But Charlotte Faurie thinks he knows the answer.
As any schoolboy could tell you, winning fights enhances your status. If, in prehistory, this translated into increased reproductive success, it might have been enough to maintain a certain proportion of left-handers in the population, by balancing the costs of being left-handed with the advantages gained in fighting. If that is tree, then there will be a higher proportion of left-handers in societies with higher levels of violence, since the advantages of being left-handed will be enhanced in such societies. Dr. Faurie set out to test this hypothesis. Fighting in modem societies often involves the use of technology, notably firms, that is unlikely to give any advantage to left-handers. So Dr. Faurie decided to confine his investigation to the proportion of left-handers and the level of violence in traditional societies.
By trawling the literature, checking with police departments, and even going out into the field and asking people, Dr. Faurie found that the proportion of left-handers in a traditional society is, indeed, correlated with its homicide rate. One of the highest proportions of left-handers, for example, was found among the Yanomamo of South America. Raiding and warfare are central to Yanomamo culture. The murder rate is 4 per 1,000 inhabitants per year. And, according to Dr. Faufie, 22.6% of Yanomamo are left-handed. In contrast, Dioula-speaking people of Burkina Faso in West Africa are virtual pacifists. There are only 0.013 murders per 1,000 inhabitants among them and only 3.4% of the population is left-handed.
While there is no suggestion that left-handed people are more violent than the right-handed, it looks as though they are more successfully violent. Perhaps that helps to explain the double meaning of the word "sinister".
The example of "Apollo Creed" is mentioned to show that
A．right-handers are put at a psychological disadvantage.
B．right-handers do not excel at boxing.
C．left-handers enjoy advantage in some sports.
D．left-handers are often involved in fighting.
Passage Two
Questions 62 to 66 are based on the following passage.
Yoga induces a feeling of well-being in healthy people, and can reverse the clinical and biochemical changes associated with metabolic syndrome, according to results of studies from Sweden and India. Metabolic syndrome is a cluster of heart disease risk factors such as high blood pressure, obesity and high blood sugar.
Dr. R.P. Agrawal, of the SP Medical College, Bikaner, India, and colleagues evaluated the beneficial effects of yoga and meditation in 101 adults with features of metabolic syndrome. In the study, 55 adults received three months of regular yoga including standard postures and Raja Yoga,while the remaining received standard care.
Waist circumference, blood pressure, blood sugar, and triglyceri HDL cholesterol levels were higher in the yoga group as compared joumal Diabetes REsearch and Clinicat Practice.
In the second study, published online December 19 in BioMed Central Complementary and Alternative Medicine, Dr. Anette Kjellgren from the University of Karlstad, Sweden and colleagues evaluated the beneficial effects of yoga-like breathing exercises on healthy volunteers.
55 adults were advised to practice "Sudarshan Kriya," which involves cycles of slow, normal and rapid breathing exercises. The exercises were practiced for an hour daily, six days a week for six weeks, while 48 controls were advised to relax in an armchair for I 5 minutes daily.
At the end of the study period, feelings of anxiety, stress and depression were significantly lower and levels of optimism significantly higher in the yoga group compared to the control group, Kjellgren and colleagues report.
Yoga induces a "relaxation response" associated with reduced nervous system activity and a feeling of well-being probably due to an increase in antioxidants(抗氧化剂) and lower levels of the stress hormone cortisol(应激激素皮质醇 ), they suggest.
Yoga not only helps in prevention of lifestyle. diseases, but can also be "a powerful adjunct therapy when these diseases anse,” co-investigator Dr. Faahri Saatiglou, from the University of Oslo, told Reuters Health. "We do not emphasize this point enough in our Westem health care."
The studies of yoga from Sweden and India have shown that __
A. yoga will make patients recover more quickly
B. yoga can cure cancer gradually
C. yoga will lead the state of being healthy
D. yoga can keep people optimistic
Over the past decade, many companies had perfected the art of creating automatic behaviors-habits-among consumers. These habits have helped companies earn billions of dollars when customers eat snacks or wipe counters almost without thinking, often in response to a carefully designed set of daily cues.
"There are fundamental public health problems, like dirty hands instead of a soap habit, that remain killers only because we can't figure out how to change people's habit," said Dr. Curtis, the director the Hygiene Center at the London School of Hygiene & Tropical Medicine. " We wanted to learn from private industry how to create new behaviors that happen automatically. "
The companies that Dr. Curtis turned to-Procter & Gamble, Colgate-Palmolive and Unilever-had invested hundreds of millions of dollars finding the subtle cues in consumers' lives that corporations could use to introduce new routines.
If you look hard enough, you'll find that many of the products we use every day-chewing gums, skin moisturizers, disinfecting wipes, air fresheners, water purifiers, health snacks, teeth whiteners, fabric softeners, vitamins are results of manufactured habits. A century ago, few people regularly brushed their teeth multiple times a day. Today, because of shrewd advertising and public health campaigns, many Americans habitually give their pearly whites a cavity- preventing scrub twice a day, often with Colgate, Crest or one of the other brands.
A few decades ago, many people didn't drink water outside of a meal. Then beverage companies started bottling the production of far-off springs, and now office workers unthinkingly sip bottled water all day long. Chewing gum, once bought primarily by adolescent boys, is now featured in commercials as a breath freshener and teeth cleanser for use after a meal. Skin moisturizers are advertised as part of morning beauty rituals, slipped in between hair brushing and putting on makeup.
"Our products succeed when they become part of daily or weekly patterns", said Carol Berning, a consumer psychologist who recently retired from Procter & Gamble, the company that sold $76 billion of Tide, Crest and other products last year. "Creating positive habit is a huge part of improving our consumers' lives, and it's essential to making new products commercially viable. "
Through experiments and observation, social scientists like Dr. Berning have learned that there is power in tying certain behaviors to habitual cues through ruthless advertising. As this new science of habit has emerged, controversies have erupted when the tactics have been used to sell questionable beauty creams or unhealthy foods.
According to Dr. Curtis, habits like hand washing with soap______.
A．should be further cultivated
B．should be changed gradually
C．are deeply rooted in history
D．arc basically private concern
Over the past decade, many companies had perfected the art of creating automatic behaviors-habits-among consumers. These habits have helped companies earn billions of dollars when customers eat snacks or wipe counters almost without thinking, often in response to a carefully designed set of daily cues.
"There are fundamental public health problems, like dirty hands instead of a soap habit, that remain killers only because we can't figure out how to change people's habit," said Dr. Curtis, the director the Hygiene Center at the London School of Hygiene & Tropical Medicine. " We wanted to learn from private industry how to create new behaviors that happen automatically. "
The companies that Dr. Curtis turned to-Procter & Gamble, Colgate-Palmolive and Unilever-had invested hundreds of millions of dollars finding the subtle cues in consumers' lives that corporations could use to introduce new routines.
If you look hard enough, you'll find that many of the products we use every day-chewing gums, skin moisturizers, disinfecting wipes, air fresheners, water purifiers, health snacks, teeth whiteners, fabric softeners, vitamins are results of manufactured habits. A century ago, few people regularly brushed their teeth multiple times a day. Today, because of shrewd advertising and public health campaigns, many Americans habitually give their pearly whites a cavity- preventing scrub twice a day, often with Colgate, Crest or one of the other brands.
A few decades ago, many people didn't drink water outside of a meal. Then beverage companies started bottling the production of far-off springs, and now office workers unthinkingly sip bottled water all day long. Chewing gum, once bought primarily by adolescent boys, is now featured in commercials as a breath freshener and teeth cleanser for use after a meal. Skin moisturizers are advertised as part of morning beauty rituals, slipped in between hair brushing and putting on makeup.
"Our products succeed when they become part of daily or weekly patterns", said Carol Berning, a consumer psychologist who recently retired from Procter & Gamble, the company that sold $76 billion of Tide, Crest and other products last year. "Creating positive habit is a huge part of improving our consumers' lives, and it's essential to making new products commercially viable. "
Through experiments and observation, social scientists like Dr. Berning have learned that there is power in tying certain behaviors to habitual cues through ruthless advertising. As this new science of habit has emerged, controversies have erupted when the tactics have been used to sell questionable beauty creams or unhealthy foods.
According to Dr. Curtis, habits like hand washing with soap______.
A．should be further cultivated
B．should be changed gradually
C．are deeply rooted in history
D．arc basically private concern
According to a report by the American Heart Association, doctors should consider prescribing【5】aspirin for middle-aged people with a family history of, or【6】for, heart disease. (Risk factors include smoking, being more than 20 percent overweight, high blood pressure and lack of exercise. )
Aspirin is also a lifesaver during heart attacks. Paramedics now give it routinely, and experts urge anyone with chest pain,【7】if it spreads to the neck, shoulder or an arm, or is accompanied by sweating, nausea (恶心), lightheadedness and breathing difficulty to chew and【8】an aspirin tablet immediately.
When taking aspirin for heart attack,【9】the plain, uncoated variety. For even faster absorption, crush and mix with a little water. Speed of absorption is critical because most heart attack deaths occur【10】the first few hours after chest pain strikes.
(1)
A．expected
B．demanded
C．assigned
D．advised
Human Heart Can Make New Ceils
Solving a longstanding (为时甚久的) mystery, scientists have found that the human heart continues to generate new cardiac (心脏的) cells throughout the life span, although the rate of new cell production slows with age.
The finding, published in the April 3 issue of Science, could open a new path for the treatment of heart diseases such as heart failure and heart attack, experts say.
"We find that the beating cells in the heart, cardiomyocytes (心肌细胞), are renewed," said lead researcher Dr. Jonas Frisen, a professor of stem cell research at the Karolinska Institute in Stockholm, Sweden. "It has previously not been known whether we were limited to the cardiomyocytes we are born with or if they could be renewed," he said.
The process of renewing these cells changes over time, Frisen added. In a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover (更替) rate decreases with age to only 0.45 percent by age 75.
"If we can understand how the generation of new cardiomyocytes is regulated, it may be potentially possible to develop pharmaceuticals (药物) that promote this process to stimulate regeneration after, for example, a heart attack," Frisen said.
That could lead to treatment that helps restore damaged hearts.
"A lot of people suffer from chronic heart failure," noted co-author Dr. Ratan Bhardwaj, also from the Karolinska Institute. "Chronic heart failure arises from heart cells dying," he said.
With this finding, scientists are "opening the door to potential therapies (疗法) to having ourselves heal ourselves," Bhardwaj said. "Maybe one could devise a pharmaceutical agent that would make heart cells make new and more cells to overcome the problem they are facing. "
But barriers remain. According to Bhardwaj, scientists do not yet know how to increase heart cell production to a rate that would replace cells faster than they are dying off, especially in older patients with heart failure. In addition, the number of new cells the heart produces was estimated using healthy hearts -- whether the rate of cell turnover in diseased hearts is the same remains unknown.
The human heart stops producing cardiac cells
A．when a person becomes old.
B．as soon as a person gets sick.
C．immediately after a person is born.
D．once a person dies.
The study also found that the type of alcohol consumed -- beer, wine or liqour -- was unimportant. Any of them, or a combination, was protective, researchers reported in today's Journal of the American Medical Association. "No study has shown benefit in recommending alcohol consumption to those who do not drink", cautioned the authors, led by Dr. Ralph L. Sacco of Columbia University College of Physicians and Surgeons in New York. But the new data support the guidelines of the National Stroke Association, which say moderate drinkers may protect themselves from strokes by continuing to consume alcohol, the authors said.
The protective effect of moderate drinking against heart attacks is well established, but the data has been conflicting about alcohol and strokes, the authors said. The new study helps settle the question and is the first to find blacks and Hispanics benefit as well as whites, according to the authors. Further research is needed among other groups, such as Asian, whom past studies suggest may get no stroke protection from alcohol or may even be put at greater risk.
Among groups where the protective effect exists, its mechanism appears to differ from the protective effect against heart attacks, which occurs through boosts in levels of so-called "good" cholesterol, the authors said. They speculated alcohol may protect against stroke by acting on some other blood trait, such as the tendency of blood platelets to clump, which is key in forming the blood trait, such as the tendency of blood platelets to clump, which is key in forming the blood clots that can cause strikes.
The researchers studied 677 New York residents who lived in the northern part of Manhattan and had strokes between July 1,1993, and June, 1997. After taking into account differences in other factors that could affect stroke risk, such as high blood pressure, the researchers estimated that subjects who consumed up to two alcoholic drinks daily were only half as likely to have suffered clot-type strokes as nondrinkers. Clot-type strokes account for 80 percent of all strokes, a leading cause of US deaths and disability. Stroke risk increased with heavier drinking. At seven drinks per day, risk was almost triple that of moderate drinkers.
An expert spokesman for the American Heart Association, who was not involved in the study, said it was well-done and important information. But it shouldn't be interpreted to mean, "I can have two drinks and therefore not worry about my high blood pressure or worry about my cholesterol," said Dr. Edgar J. Kenton, an associate professor of clinical neurology at Thomas Jefferson University Medical College in Philadelphia. Instead, he said, the study provides good reason to do further research and to add alcohol to the list of modifiable risk factors for stroke.
The new study conducted by Dr. Sacco and his colleagues is unique in that ______.
A．it refutes early studies on the protective effect of moderate drinking against heart attack
B．it confirms early studies of moderate drinking against heart attacks
C．it helps to resolve the disputes over the effect of moderate drinking against stroke
D．it finds that moderate drinking can benefit people of different races equally well
