急性蜂窝织炎性阑尾炎的组织学特点是（）

A．管壁全层弥漫性中性粒细胞浸润

B．管壁局部坏死

C．黏膜坏死伴中性粒细胞浸润

D．管腔闭塞，远端黏液滞留

E．充血水肿，伴浆细胞浸润

— Hi, David, I heard you had an accident this morning.

— Yes. Luckily, I hit the brakes in time ______ I would have been injured badly. [ ]

A. and

B. but

C. or

D. so