______ the window. It's clean. [ ]

A. Not clean

B. Aren't clean

C. Don't clean

D. Clean

男性，47岁。急性发作腹痛5天，高热，上腹部可扪及压痛的肿块。B超检查示积液性包块。尿淀粉酶2048U/L。诊断首先应考虑（）

A.腹腔脓肿

B.胰腺囊肿并发感染

C.溃疡病穿孔膈下脓肿

D.肝脓肿

E.胆囊积脓