**请教prep上的一个逻辑题

bdx2010

70.   答案是E，请NN指教，非常感谢)

According to a review of 61 studies of patients suffering from severely debilitating depression, a large majority of the patients reported that missing a night's sleep immediately lifted their depression.  Yet sleep-deprivation is not used to treat depression even though the conventional treatments, which use drugs and electric shocks, often have serious side effects.

Which of the following, if true, best explains the fact that sleep-deprivation is not used as a treatment for depression?

(A) For a small percentage of depressed patients, missing a night's sleep induces a temporary sense of euphoria.

(A) For a small percentage of depressed patients, missing a night's sleep induces a temporary sense of euphoria.

(B) Keeping depressed patients awake is more difficult than keeping awake people who are not depressed.

(C) Prolonged loss of sleep can lead to temporary impairment of judgment comparable to that induced by consuming several ounces of alcohol.

(D) The dramatic shifts in mood connected with sleep and wakefulness have not been traced to particular changes in brain chemistry.

(E) Depression returns in full force as soon as the patient sleeps for even a few minutes.

[此贴子已经被作者于2009/8/18 19:18:38编辑过]

wxsimon

本来想选C的？因为感觉更像side effect。但是E同样也说出了sleep deprivation治疗的一个缺陷。而且C中貌似引入了新的概念alcohol，但是没有说明alcohol有怎样坏的影响。所以E显得更直接一点（睡一小会儿面临更大的depression，所以sleep deprivation效果不佳）

[此贴子已经被作者于2009/8/17 8:27:19编辑过]

zouyochin

这个肯定选E，表明sleep deprivation的效果不能持续，因为人不可能一直不睡觉