题目内容：

假设你是李华，你在美国夏令营认识的朋友Mike给你来信说他最近沉迷于电脑（Internet addiction）难以控制。请你给他回一封信，告诉他网瘾可能会导致成绩下降、健康状况恶化、与家人产生矛盾等问题，并提出一些建议。

注意: 1. 词数100左右；

2. 可适当增加细节，以使行文连贯。

Dear Mike,

I am glad to hear from you._________________________________________________________________

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Yours,

Li Hua