Two new studies have stirred things up: one warning that antidepressants do not help most people very much, and the other gushing that they are a marvellously cheap way to save lives.

• 两项新的研究使事情变得混乱，一项警告说对于大多数人抗抑郁药无明显作用，另一项却表明抗抑郁药能廉价有效的改善生活。