患者，女，28岁，室间隔缺损，体外循环下行室缺修补术。术后4小时发现胸腔血性引流物增加。

此时应采取的正确措施是（）。

A.输FFP

B.补充血小板

C.输冷沉淀

D.开胸探查

E.静注鱼精蛋白

Billionaires Bill Gates and Warren Buffett asked American billionaires to ______ at least half of their wealth to charities.

A．take away

B．give away

C．take up

D．give up