--Tom is such a stupid student that he had failed in every exam.

---Sorry, I won’t agree. He is ________ than stupid.

A．lazier

B．no lazier

C．more lazy

D．lazier rather

患者男性，25岁。胸部被撞伤2小时。自诉胸闷，头昏，查体：血压101/73mmHg，脉搏104次/分，面、颈、上胸部可见针尖大小的瘀斑，左侧胸壁吸气时局部胸壁内陷，呼气时外凸。胸部X线检查未见胸膜腔内积气、积液。术后4天，体温36.7℃，胸腔闭式引流24h引出淡黄色液体20ml，水柱波动不明显。下一步的处理为（）.

A.查血常规

B.听诊肺呼吸音

C.血生化检查

D.PET-CT

E.胸CT

F.胸部X线片;考虑拔除胸腔引流管