怀疑患者为溃疡性结肠炎，最重要的检查是（）
A.血常规
B.结肠镜加活检
C.腹部CT
D.血沉
E.便常规
参考答案：B
— What would you do if you won the lottery?
— I would give it_____ medical research.
A．of
B．for
C．to
D．at
保险人对哪些必要合理费用须承担支付义务？
