2. 考研
  3. Our bodies are wonderfully skillful at maintaining balance. When the temperature jumps, we sweat to cool down. When our blood pr

Our bodies are wonderfully skillful at maintaining balance. When the temperature jumps, we sweat to cool down. When our blood pr

admin2005-06-26  78
问题     Our bodies are wonderfully skillful at maintaining balance. When the temperature jumps, we sweat to cool down. When our blood pressure falls, our hearts pound to compensate. As it turns out, though, our natural state is not a steady one. Researchers are finding that everything from blood pressure to brain function varies rhythmically with the cycles of sun, moon and seasons. And their insights are yielding new strategies for keeping away such common killers as heart disease and cancer. Only one doctor in 20 has a good knowledge of the growing field of "chronotherapeutics"(历史治疗术), the strategic use of time(chronos)in medicine. But according to a new American Medical Association poll, three out of four are eager to change that. "The field is exploding," says Michael Smolensky, "Doctors used to look at us like ’ What spaceship did you guys get off?’ Now they’re thirsty to know more. "
    In medical school, most doctors learn that people with chronic conditions should take their medicine at steady rates. "It’s a terrible way to treat disease," says Dr. Richard Martin. For example, asthmatics(气喘患者)are most likely to suffer during the night. Yet most patients strive to keep a constant level of medicine in their blood day and night, whether by breathing in on an inhaler(吸入器)four times a day or taking a pill each morning and evening. In recent studies, researchers have found that a large mid-afternoon dose of a bronchodilator(支气管扩张剂)can be as safe as several small doses, and better for preventing nighttime attacks.
    If the night belongs to asthma, the dawn belongs to high blood pressure and heart disease. Heart attacks are twice as common at 9 a. m. as at 11 p. m. Part of the reason is that our blood pressure falls predictably at night, then peaks as we start to work for the day. "Doctors know that", says Dr. Henry Black of Chicago’s Medical Center, "but until now, we haven’t been able to do anything about it. " Most blood-pressure drugs provide 18 to 20 hours of relief. But because they’re taken in the morning, they’re least effective when most needed. "You take your pill at 7 and it’s working by 9," says Dr. William White of the University of Connecticut Health Center, "but by that time you’ve gone through the worst four hours of the day with no protection. " Bedtime dosing would prevent that lapse, but it would also push blood pressure to dangerously low levels during the night.
Which of the following statements is NOT true?
选项 A、Doctor know more about chronotherapeutics than before.
B、Doctors in the U. S. used to be thirsty to know more about the new medical field.
C、The researchers’ insights are providing new strategies to prevent common killers.
D、The strategic use of time in medicine attracts more attention in the medical circle in the U. S.
答案B
解析 本题中要求选出不对的说法，可以用排除法。文章第一段中提到“Only one doctor in 20 has a good knowledge of the growing field of‘chronotherapeutics’，the strategic use of time(chronos)in medicine．But according to a new American Medical Association poll，three out of four are eager to change that．”从这句话我们可以看出现在医生对“历时治疗法”的了解要比以前多。医学上时间的战略性应用也引起了更多人的关注。可见，A项和D项正确，所以可以排除A、D。C项的内容在文章第一段中提到，“他们的领悟正在形成探究防范像心脏病和癌症这样的普遍的杀手的新策略”，所以C项也可以排除。因此本题的正确答案为B。
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