— Please _____ us in the discussion.

— I'd like to, but I'm _____ busy at the moment. [ ]

A. attend; too

B. join, far too

C. take part in; much too

D. join; too much

患者，女性，65岁，1年前曾行右眼泪囊摘除术，术后右眼下睑仍间断出现红肿，鼻侧结膜充血，压迫下睑内侧，可见少量脓性分泌物从下泪小点排出，泪小点水肿。余无异常。可能的诊断是（）

A.急性结膜炎

B.溃疡性睑缘炎

C.眦部睑缘炎

D.泪小管炎

E.睑腺炎