Chronic insomnia is a major public health problem. And too many people are using【C1】______therapies, even while there are a few

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问题    Chronic insomnia is a major public health problem. And too many people are using【C1】______therapies, even while there are a few treatments that do work. Millions of Americans【C2】______awake at night counting sheep or have a stiff drink or【C3】______a pill, hoping it will make them sleepy.【C4】______experts agree all that self-medicating is a bad idea, and the causes of chronic insomnia remain【C5】______.
   Almost a third of adults have trouble sleeping, and about 10 percent have【C6】______of daytime impairment that signal true insomnia. But【C7】______the complaints, scientists know surprisingly little about what causes chronic insomnia, its health consequences and how best to treat it, a panel of specialists were【C8】______together by the National Institutes of Health concluded Wednesday. The panel called【C9】______a broad range of research into insomnia, 【C10】______that if scientists understood its【C11】______causes, they could develop better treatments.
   Most, but not all, insomnia is thought to【C12】______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【C13】______complicates those other problems. Other diseases【C14】______, the risk of insomnia seems to increase with age and to be more【C15】______among women, especially after their 50s. Smoking, caffeine and numerous【C16】______drugs also affect sleep.
   The NIH is spending about $200 million this year on sleep-related research, some【C17】______to specific disorders and others【C18】______the underlying scientific laws that control the nervous system of sleep. The agency was【C19】______the panel’ s review before deciding what additional work should be【C20】______at insomnia.
【C7】

选项 A、in addition to
B、except for
C、owing to
D、for all

答案D

解析 本题考查逻辑关系。从文意看,前面的“抱怨”(complaints)和后面科学家研究的对象“慢性失眠的原因、影响及治疗方法”之间不是包含(in addition to意为“除……之外,还有”)或不包含(except for意为“除……以外、要不是”)这种并列关系,所以可排除A项和B项。其次,前后也不构成因果关系,排除C项owing to“由于,因为”。D项for all“尽管,虽然”表让步关系,符合文意,即“尽管(社会上关于慢性失眠的)抱怨很多,但科学家们对慢性失眠的原因,其对健康的影响以及如何有效地治疗慢性失眠都知之甚少”。
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