直肠癌出现便血，鉴别诊断中不应有：

A．肛 * * 肥大

B．肠炎

C．痢疾

D．内痔

E．直肠息肉

The firemen broke down the wall in order to gain quick access ________ the building on fire.[ ]

A. toward

B. to

C. of

D. into