关于缺血性肠病正确的是（）

A.好发于儿童

B.结肠脾曲最常受累

C.营养不良是主要病因

D.很少引起肠梗死

E.可见裂隙状溃疡

—You all like your English teacher?

—Yeah, she devotes herself____ to teaching and it earns her a good reputation．

A．originally

B．extremely

C．obviously

D．entirely