—  _______?

— Will you please get me some medicine so that I can have a good sleep? [       ]

A. How are you feeling            

B. What's the matter

C. Is there anything wrong          

D. Can I help you

体内药物分析中最难、最繁琐，而且也最重要的一个环节是（）

A.样品的采集

B.蛋白质的去除

C.样品的分析

D.样品的制备

E.样品的贮存