—Tom seems to be familiar with London.

---Yes. He ___________ here for three years.  It’s great for him to be back.

A．have lived

B．had lived

C．lived

D．lives

关于胸腔穿刺放液以下哪项正确( )

A．一次放液量不超过500ml
B．一次放液量不超过1000ml
C．放液至解除压迫症状为止
D．尽可能一次将胸水抽完
E．抽水越多越安全