If you insist on continuing like this, I think you take a risk of________to leave the company.[ ]

A. to force  

B. to be forced

C. forcing  

D. being forced

患者，男，60岁，进食时胸骨后烧灼样疼痛1个月，多年嗜酒史，食管钡餐透视未见明显异常，为进一步明确诊断，应做下列哪项检查（）。

A.胸片

B.胸部CT

C.食管镜检查

D.大便潜血试验

E.继续观察