下述哪项符合无菌技术操作原则()。

A．无菌操作前30min清扫地面

B．无菌包潮湿待干后使用

C．取出的无菌物品未用立即放回原处

D．治疗室每周用紫外线照射1次

E．操作时手臂保持在腰部水平以上

Speaker A: I think I'm coming down with something. Speaker B:______

A．You shouldn't tell me, you should tell the doctor.

B．Maybe you'd better see a doctor.

C．When did you come down with a cold

D．Don't worry. Everything will be all right.