2. 考研
  3. Chronic insomnia is a major public health problem. And too many people are using 【B1】______ therapies, even while there are a fe

Chronic insomnia is a major public health problem. And too many people are using 【B1】______ therapies, even while there are a fe

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问题     Chronic insomnia is a major public health problem. And too many people are using 【B1】______ therapies, even while there are a few treatments that do work. Millions of Americans 【B2】______ awake at night counting sheep or have a stiff drink or 【B3】______ an pill, hoping it will make them sleepy. 【B4】______ experts agree all that self-medicating is a bad idea, and the causes of chronic insomnia remain【B5】______.
    Almost a third of adults have trouble sleeping, and about 10 percent have 【B6】______ of daytime impairment that signal true insomnia. But【B7】______the complaints, scientists know surprisingly little about what causes chronic insomnia, its health consequences and how best to treat it, a panel of specialists【B8】______together by the National Institutes of Health concluded Wednesday. The panel called 【B9】______ a broad range of research into insomnia,【B10】______that if scientists understood its【B11】______causes, they could develop better treatments.
    Most, but not all, insomnia is thought to【B12】______other health problems, from arthritis and depression to cardiovascular disease. The question often is whether the insomnia came first or was a result of the other diseases and how trouble sleeping in【B13】______complicates those other problems. Other diseases【B14】______, the risk of insomnia seems to increase with age and to be more【B15】______among women, especially after their 50s. Smoking, caffeine and numerous【B16】______drugs also affect sleep.
    The NIH is spending about $200 million this year on sleep-related research, some【B17】______to specific disorders and others【B18】______the underlying scientific laws that control the nervous system of sleep. The agency was【B19】______the pane’ s review before deciding what additional work should be【B20】______at insomnia.
【B4】
选项 A、And
B、Though
C、Thus
D、But
答案D
解析 考查逻辑关系。前文说“上百万的美国人夜里睡不着觉，躺着数羔羊、喝杯烈酒或吞个药片，希望这会使他们产生困意”。后文指出“自作主张乱吃药并不是解决失眠的好方法”，可见前后是转折关系，故选D．But“但是”。And“和”；Though“尽管”；Thus“因此”，均不符合题意。
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