填入一个适当的词补全对话，每空一词。

A: Good morning, Doctor.

B: Good morning. can I help you, young man?

A: I am always tired, and I slept well since the day before yesterday.

B: your job?

A: I am a teacher. Does it matter?

B: Maybe, how many hours do you work?

A: I am not sure, but at least 12 hours a day.

B: That's a lot. Do you often take exercise?

A: Not very often. I don't have the time.

B: Well, you need to find some time. Try to work and do more sports.

A: Thanks, do I need to take some medicine?

B: I don't think you need it. Just follow my advice. lf you don't feel better, please come to see me once .

Lin Tao: OK, many thanks.