______ of the parents has confirmed it was their child’s fault to be late for class, saying the school bus came later than usual.

A．Both

B．Either

C．None

D．Neither

男，28岁，主因腹痛、腹泻就诊。体格检查右下腹压痛，并可触及腹块。

如患者结核菌素试验阳性，则还需要考虑的病变是（）

A.溃疡性结肠炎

B.消化性溃疡

C.Crohn病

D.小肠淋巴瘤

E.肠结核

F.慢性结肠炎