女，58岁，腹痛腹胀1年余，结合图像，最可能的诊断为（）
A.正常十二指肠肠圈
B.十二指肠炎
C.十二指肠降段憩室
D.十二指肠水平段憩室
E.十二指肠占位
参考答案：C
解析：十二指肠憩室为肠壁局部向外膨出的囊袋状病变，比较常见。多发生在十二指肠降部的内后壁，尤其是壶腹周围，其次为十二指肠空肠曲交界处，可单发或多发，年龄多在中年以上。
| Questions 23-26 |
A．(A) You should be absent from work for 2 weeks before you hand in your resignation.
B．(B) You should submit your resignation at least 2 weeks before you leave.
C．(C) You should avoid having an exit interview with your immediate supervisor.
D．(D) You should first settle all your personnel items with the personnel manager.