引起左膈下脓肿最常见的原因是（）。

A.急性胰腺炎

B.脾包膜炎

C.化脓性肠系膜淋巴结炎

D.左肾周围脓肿

E.脾切除术后并发症

听句子，缩写原文。（）

A．With such a big order, our side demands a discount which is 10% or over.

B．At least 10% of the expenses should be devoted to solving the problem.

C．Although we have spent much on the project, a 10% increase in our budget is necessary.

D．We asked for a 10% discount, which has caused all the trouble on our side.