问题
单项选择题
张先生，25岁，用力排便时，肛门有一肿物脱出，不能回缩，伴有疼痛，且便后肛门滴血，张先生患的是（）
A．肛裂
B．直肠息肉(无蒂)
C．内痔嵌顿
D．肛瘘
E．直肠肛管周围脓肿
答案
参考答案：C
解析：
肛裂、肛瘘、直肠肛管周围脓肿一般无肿物从肛门脱出，无蒂的直肠息肉也无法脱出。
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张先生，25岁，用力排便时，肛门有一肿物脱出，不能回缩，伴有疼痛，且便后肛门滴血，张先生患的是（）
A．肛裂
B．直肠息肉(无蒂)
C．内痔嵌顿
D．肛瘘
E．直肠肛管周围脓肿
参考答案：C
解析：
肛裂、肛瘘、直肠肛管周围脓肿一般无肿物从肛门脱出，无蒂的直肠息肉也无法脱出。
| 单句改错 | |
| 1. The student I want to see is the one whom studies hardest. 2. May I use the pen that you bought it yesterday? 3. The students who was often praised by the teacher went to college last summer. 4. The hotel where we stayed in was both cheap and comfortable. 5. They talked of things and people who they remembered in the hospital. | __________ __________ __________ __________ __________ |