The driver could have survived but he          the seat belt.

A．had been wearing

B．hadn't worn

C．wasn’t wearing

D．didn't wear

患者35岁，女性，低热、食欲下降，腹胀2个月，停止排气排便1天，腹痛、恶心呕吐4小时，既往结核病史，查体发现脐周包块，肠鸣音亢进。

为进一步明确病因，该患者不需要的检查是()

A．血沉

B．PPD

C．胸片

D．腹部CT

E．腹腔镜