— Must I be in hospital for a week, Doctor? 

— No, you           . You can go back home tomorrow. [ ]

A. mustn't

B. needn't

C. must

原醛的肾素、血管紧张素Ⅱ和醛固酮的变化特点是（）。

A.醛固酮高而肾素、血管紧张素Ⅱ正常

B.醛固酮高而肾素、血管紧张素Ⅱ低

C.醛固酮、肾素、血管紧张素Ⅱ都高

D.醛固酮与肾素高而血管紧张素Ⅱ正常

E.醛固酮与肾素高而血管紧张素Ⅱ低