补全对话，根据所给对话，填写适当的内容，使其完整正确。(每空词数不限)

A: You look upset. ?

B: I often feel tired these days.

A: I'm sorry to hear that. Let me have a look.

B: OK, doctor.

A: ?

B: Since two weeks ago.

A: Well, there is nothing wrong with you. ?

B: No. I'm busy with my work all day. I have no time for exercise.

A: How about your sleep?

B: , doctor. Could you give me some sleeping medicine?

A: Yes, I can. But you should do more exercise.

B: You are right. It's important to keep healthy.

A: I hope .