为进一步确诊首先应作哪项检查

A．腹部B型超声

B．X线腹部立位片

C．内镜

D．腹腔穿刺

E．血淀粉酶

Though he has to ________ a hard time, he still holds a positive attitude towards life.[ ]

A. go through  

B. look through

C. go by  

D. see through