男性，46岁，胃痛十余年，近半年症状加重持续上腹痛，尚能进食，上腹部偏右可扪及5cmX6cm肿块，移动浊音阳性，肛诊检查，直肠前壁触及质坚硬节，临床诊断胃癌，下列哪种治疗是合理的：( )

A.前驱期易误诊为精神病
B.血氨不增高，可排除肝性脑病
C.扑翼样震颤、血氨增高及脑电图异常同时出现有助于诊断
D.急性肝功能衰竭所致脑病血氨多正常
E.应与其他引起昏迷的疾病相鉴别

A．Because the telephone line is busy during work hours.
B．Because employees are not supposed to do anything personal at work.
C．Because private conversation is not supposed to be heard in office.
D．Because the call would cost Mr. Power a lot of money.