患者女，40岁。因突起腹中部疼痛发作伴血便3天入院。腹痛为阵发性，伴恶心、呕吐。呕吐为胃内容物，起病后曾解黏液血便3次。患者于1个月前腹痛开始反复发作，伴解黏液血便，腹痛发作时，自感有"气块"在腹内串动。体查：消瘦、贫血貌，腹稍胀，全腹软，无局限性压痛及肌紧张，下腹正中可扪及10cm×6cm肿块，坚韧，轻压痛，上下可以推动，肠鸣音活跃，音调稍高。
下列不是高危结肠癌患者预后不良因素的是（）
A.肿瘤固定
B.脉管瘤栓
C.术后肠梗阻
D.淋巴结检出数目＜12个
E.切缘残留
F.术后吻合口出血
参考答案：B, F
Early in the morning, at noon, or in the evening in big cities and in the countryside, all over the United States, you can see Americans running — men and women, young and old. People run — along the beaches of California, Central Park in New York, down quiet streets in small towns or at the gym. Some people even run in living rooms. Running wasn’t so popular in the past. In the 1960s, runners were mostly athletes and healthy strong people. When people saw a runner, they used ,“Hey, what’s the hurry for？”or they might say to ,“Is he crazy？”At that time, women almost never ran. If they did, they might be laughed at. But today all these have Men and women of all enjoy running. Doctors say many of the health problems in the United States these bad habits: eating too much, smoking cigarettes, and taking exercise. Doctors tell us,“Eat less, don’t smoke, and exercise more. ”Running is a good exercise it helps build strong hearts and lungs. It also helps most people lose weight.
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