女性，26岁，既往风湿性心脏病伴主动脉瓣狭窄，近2周乏力不适，不发热。体检：皮肤有少许瘀点，主动脉瓣区有双期杂音，脾大。血红蛋白80g/L。最符合下列哪项诊断（）

A.风湿性心脏病心力衰竭

B.贫血性心脏病

C.先天性心脏病主动脉瓣病变

D.风湿性心肌炎

E.风湿性心脏病并发感染性心内膜炎

The human beings have polluted the environment seriously. It is time the United Nations must take some measures.

A. take
B. taking
C. to take

D. took