— How many students are going to the Great Wall?

— ____.

A．None

B．No one

C．No

D．Not any

肾病综合征发生血栓、栓塞最常见的部位为（）

A.肺动脉

B.肾静脉

C.冠状血管

D.下肢静脉

E.下腔静脉