-- I just can’t stop worrying about the result of the job interview.

--_______ . There’s nothing you can do now but wait.

A．Relax

B．Go ahead

C．Go for it

D．Good luck

可使呼吸膜面积减小的因素有（）。

A.肺不张

B.肺实变

C.肺气肿

D.肺水肿

E.支气管炎