—I'm sorry for losing your pen.    

—______         [ ]

A. You're welcome.  

B. Thank you all the same.

C. It doesn't matter.

呃逆的病理主要是（）

A.肝气逆乘犯胃

B.胃气上逆动膈

C.胃失和降，气逆于上

D.阳明腑实，气不顺行

E.耗伤中气，胃失和降