英语翻译一封信（主要是开头的“Dear Dr know”应该是怎样翻译）

英语翻译一封信（主要是开头的“Dear Dr know”应该是怎样翻译）
Dear Dr know,
I'm not happy.I have too many rules in my house.I have to get up at six o'clock every morning.I can't meet my friends after school because I have to do my homework.I can't watch TV on school nights.And I have to be in bed by ten o'clock.On weekends,I have to clean my room and wash my clothes.Then I have to help my mom make dinner.Later I have to go to the Children's Palace to learn the piano.I never have any fun.What can I do?
Zhao Pei