假定你是李华，你的同学John因学习和生活问题感到身体不适，请你结合自己的生活体验，根据提示内容给他回复电子邮件，内容包括：
1．健康的重要性;
2．提出建议：平衡饮食、锻炼身体等至少两条建议。
注意：1．词数应为80左右，开头与结尾已给出，不计入词数;
2．可适当增加细节，以使行文连贯。
Dear John,

Learning that you have trouble in keeping healthy,   I’m writing to offer you some practical suggestions.

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I do hope these advice will be helpful to you and you will lead a healthy and enjoyable life.

Yours,

Li Hua