--You should have thanked her before you left.

--I meant ________, but when I was leaving I couldn’t find her anywhere.

A．to do

B．to

C．doing

D．doing so

重症急性胰腺炎出现肠麻痹时，不宜应用的药物是（）

A.奥曲肽

B.抗生素

C.H₂受体拮抗剂

D.质子泵抑制剂

E.抗胆碱能药物