— Mum, would you please buy me an MP5 player?

— If you can help do some housework the whole vacation, you ____ have one as a reward.     

A．must

B．need

C．would

D．shall

患者，男，19岁。一天前在外吃海鲜后，出现发热，腹痛下痢，大便夹有黏冻、脓血，肛门灼热，舌红苔黄腻，脉濡数。其属（）

A.肾虚泄泻

B.脾虚泄泻

C.寒湿泄泻

D.湿热泄泻

E.痢疾