呕吐物含胆汁食物的是（）
A.倾倒综合征
B.吻合口出血
C.空肠输出端梗阻
D.吻合口梗阻
E.十二指肠残端破裂
参考答案：C
— Would you like to go out for a walk with us?
— _____, but I must write a letter to my pen friend now. [ ]
A. Of course not
B. That' s all right
C. I'd love to
D. Yes, I do
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