学进去

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、损害家庭关系等问题，并提出一些建议。
注意:
1. 词数100左右（开头和结尾已给出, 但不计入总词数）；
2. 可适当增加细节, 以使行文连贯。
参考词汇: 沉溺于be/become addicted to 网瘾Internet addiction
Dear Mike,

I am glad to hear from you.

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Yours,

Li Hua