Why does the man want to buy the blue one
[A] It’s nice and cheaper.
[B] His son likes the color.
[C] There aren’t any black ones left.

引起直肠周围感染可能性最大的为

A．直肠下段损伤

B．后 * * 损伤

C．腹膜后血肿

D．直肠上段损伤

E．胰腺损伤