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

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

我理解E选项,是说明了SLEEP-DEPRIVATION的无效,也理解list their depression是减轻的意思,但是为什么不选C呢??我觉的C有将方法归谬的意思,来说明它的不可行~~~

希望大家指教丫........

 E 现在有个方法可以治疗depression，但是这个方法用后只有加重depression，所以不可用。

C 这个治疗depression的方法，有个副作用，就是impairment of judgement。

两个比较哪个更说明问题呢？

E 彻底推翻，根本就不能治疗。

C 有副作用，能不能治疗没有说，可以认为它有效。