下面是一位母亲的来信：I am really worried about my daughter,Judy always

下面是一位母亲的来信：I am really worried about my daughter,Judy always things she is too fat.She eats only a little rice and some vegetables .and she eats no fish ,beef or pork."Cake"and"dessert"are taboo words .The problem is that she is not fat at all.In fact,the doctor says she is thin and unhealthy.but she still believes being thinner will make her prettier.I am afraid that she will be sick before she becomes"prettier".Could you give some advice to my daughter?
假如你是李明,请你根据这位母亲的来信,给Judy写一封信,给他提一些建议.60—80词