词汇：
Chore n.零星活儿 gut n.下消化道，肠;胃
Antidepressant n.抗抑郁药 intestine n.肠
Serotonin n.血清素
注释：
1.get out of：逃避
2.Don’t be so sure that the pain they feel is all in their minds：不要确信无疑他们所感觉到的疼痛全部是想象出来的。题目中的in his head等同于in his mind。
3.makes it a point to do sth：决心(坚持)做某事
4.nothing’s coming up：没有任何结果
