-People in Colombia needn’t make plans to meet their friends. They often just drop by them.

A．give a ride to

B．give up visiting

C．forget to visit

D．come over to

下列哪项是肺癌肺叶切除术后支气管胸膜瘘的原因

A．支气管残端处理不当

B．术后患者咳嗽

C．支气管残端残留阳性

D．支气管残端感染

E．术后胸腔感染