男性，70岁，粪便中带血两年，逐渐消瘦。查体：面色苍白，腹软，右侧腹部可触及一约5cm×4cm大小肿块，较硬伴压痛，则该患者可能为

A．溃疡性结肠炎

B．肠结核

C．阿米克肠病

D．克隆病

E．右半结肠癌

While he has got high marks in the college entrance examination, he thinks that it is ______________ satisfactory.

A．out of

B．due to

C．far from

D．free from