题目内容：
Passage 1Since most episodes of depression are triggered (引发) by life events or circumstances, the causes of depression are different for everyone. In a very .general way, the direct answer to the question of what causes depression is; difficult circumstances. Understanding what.s "difficult" is akin to understanding pain thresholds. What one person finds difficult, another may not.
What we know is that depression is on the rise—or at least, the diagnosis of depression is on the rise. Not unlike other illnesses or diseases, when there is awareness and "active screening" for a particular condition fin this case, such screening is done through diagnostic catena listed in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, an often-criticized "recipe book" of psychiatric symptoms published by the American Psychiatric Association), there is a rise in the number of cases reported. In other words, when you.re looking for something, you.ll find it Of course, not looking for something doesn.t mean it isn.t there. The question remains: Is it better to seek out depression and treat it, ending unnecessary suffering? Many health care practitioners would answer, "Yes!"
Although there is some agreement among health care providers that depression is a biological state—in that brain chemistry is altered in depressed people—it is unusual for this to occur in the absen
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