We are looking for someone who is___ and hard-working.

A．anxious

B．reliable

C．unknown

D．foolish

诊断肺动静脉瘘的最可靠的指标是

A．咯血、发绀、杵状指
B．继发性贫血或继发性红细胞增多症
C．病变附近的胸壁可听到血管收缩期杂音
D．肺动脉造影
E．胸部X线检杏发现圆形病灶