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.
(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.
题目意思是说，因为绝不部分忧郁的病人，如果失眠过后，会更忧郁。所以‘不让’睡觉‘这个疗法没有用来治疗忧郁，尽管传统疗法有很多副作用。
E说，病人只要一睡觉，忧郁就会回来，强度和原来一样。-----如果是这样的话，那就不该让病人睡觉，那么’sleep-deprivation ‘就应该用来治疗啊。 这个怎么来解释现象呢？
我选的是C，就是失眠会导致暂时的没有判断力，效果就跟喝酒一样。----这个好像也无关啊。
请高手解释一下，多谢。 | 
