书面表达。
Tom 最近遇到了难题，他给某医学杂志的专栏作者Jenny 写了一封信，以寻求帮助。

Dear Jenny, I was a very good student before, but these days I can’t follow my teachers at school. I’m very worried about my lessons. I’m always under too much pressure(压力). Now I can’t sleep well at night. I don’t know what I should do. Can you help me? Thanks a lot. Yours, Tom

根据信件内容及下列所给提示，帮Jenny 给Tom 写一封回信。
词数要求：80词左右。
提示：
1.向老师和父母求助，让他们在学习上给予帮助；
2.尽量放松，不要考虑太多；
3.睡前做些运动；
4.在床上听一些轻音乐。
Dear Tom,
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Yours,                                                                 Jenny