生物密度效应的基本规律有哪两个？其主要特征是什么？

从下边的方框中选择最佳选项填入空白处，完成对话。（共5小题，每小题1分）

A. I feel very well. B. I hope you will get better soon. C. Do you sleep well at night? D. I'm not feeling well. E. And do some exercise every day. F. You need to eat less food. G. There is nothing serious.

A: What's wrong with you, Mr Green? You look pale!
B: 小题1: I can't do any work, doctor.
A: Do you have a cold?
B: No, I don't have a cold.
A: 小题2:
B: Yes, I always sleep very well.
A: Do you have breakfast every morning?
B: No, I don't have breakfast. And I have only a little food for lunch and supper because I want to keep thin.
A: Oh, I see.   小题3:  You need to eat more food and have three meals a day.  小题4: 
B: Ok. I will do like that.
A:  小题5: 
B: Thank you very much.