The child asked his mother          go out to play tennis.

A．that he could

B．if he could

C．whether could he

D．that if he could

患者男，38岁。今日晨练时突发喘气、胸闷1小时。查体：端坐呼吸，口唇发绀，双肺叩诊过清音，呼吸音减弱，未闻及哮鸣音及湿啰音，心率120次／分。血气分析PaO₂50mmHg，PaCO₂30mmHg。诊断为（）

A.哮喘急发

B.急性肺栓塞

C.急性左心衰竭

D.气胸

E.肺炎