— Guess what! I came across an old friend at the party last night.

— _____ I'm sure you had a wonderful time. [ ]

A. Very well.

B. Sounds good!

C. How nice!

D. All right.

患儿，女，3岁，心悸、乏力，听诊胸骨左缘第2肋间收缩期杂音，胸片示：双肺纹理稀疏、细纤，透光好，心脏呈“靴”形，最可能的诊断是

A．房间隔缺损

B．室间隔缺损

C．动脉导管未闭

D．单纯肺动脉狭窄

E．法洛四联症