—Have you got some water to drink?

—Here you are. There _______ still some in the bottle. [ ]

A. are

B. has

C. is

D. have

引起肺血栓栓塞的栓子最常见来自（）

A.右心腔

B.上腔静脉径路

C.下肢深静脉

D.中心静脉

E.锁骨下静脉