男，52岁，近2个月来大便次数增多，有肛门坠胀感及里急后重，大便变细。常有黏液血便，经抗生素治疗症状可缓解，但不久又复发，且呈进行性加重。
若经病理检查证实为直肠腺癌，肿瘤下缘距肛门约12cm，肿块直径约4cm。最佳手术方式应选择（）
A.Miles手术
B.乙状结肠造口术
C.Hartmann手术
D.Dixon手术
E.局部切除
参考答案：D
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| There are four seasons in a year. They are spring, summer, fall and winter. 1________ is the first season of the year. It is getting 2________ and flowers begin to open. Trees and grass begin to turn 3________. It's usually rainy, people like to fly kites. Then it is summer and it is the 4________ season of the year. The days get 5________, so we can play in the afternoon. 6________ is the third season. It's very beautiful. It's not too hot and not too cold. There is usually 7________ in fall and leaves begin to turn yellow and come down. Many people like to have a picnic in the park. The last season of the year is winter. People usually don't like to go 8________ because it is cold. And there is sometimes 9________ in winter. Then we play with it. But it is the 10________ of the year. So we have to wear heavy clothes such as winter jacket in winter.
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