假如你是某家英文报社的编辑，昨日收到一位中学生读者王丽的来信。请根据来信内容和所给的要点提示用英语写一封回信。词数100左右。
Dear Editor，
I am a hardworking girl and want to be the number one in my class. But in the exams, I always make mistakes that I should have avoided. I really worry about it. What can I do to improve my performance in exams?
Wang Li
