I received and read your letter, in which you mentioned that you wanted to lose weight by dieting.
Young girls at your age want to look beautiful, which is natural. However, in my opinion, health is more important than beauty. For a student, study is the first thing to consider, followed by appearance. So don't let other people's opinions affect your normal life. However, if you want to lose weight, it is a good idea to exercise and change unhealthy eating habits. The most important thing is that you keep a healthy attitude, because it will help you study and overcome the difficulty of dieting.
I hope my suggestions will help you, and I look forward to your next letter.
Yours,
Li Hua