70. (35281-!-item-!-188;#058&007608)
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（取消） 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.
[逻辑分析：研究61个轻微抑郁的病例，大部分主要的被研究者报告说，一个晚上的失眠就会导致抑郁消失，然而，睡眠剥夺这一手段仍然未被采用，即使原有的治疗手段：药物和电子冲击等手段有副作用]
Which of the following, if true, best explains the fact that sleep-deprivation is not used as a treatment for depression?
==> 解题思路，找出不采用这一治疗手段的原因
(A) For a small percentage of depressed patients, missing a night's sleep induces a temporary sense of euphoria兴奋.[未能解释为何不采用该手段治疗]
(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. 正确答案
我选了D ，
不好意思，查字典后就明白选E的原因了
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