患者男性，26岁，建筑工人，因外伤致右尺桡骨和股骨中段骨折，右手3指离断，餐后30分受伤，拟行急诊清创、骨折内固定和断肢再植手术。提示：患者入室后测生命体征基本正常，选择右侧连续臂丛阻滞+腰段腰－硬联合麻醉，麻醉实施顺利，麻醉效果佳。
提问：以下叙述错误的是哪些（）
A.手术时间长，应注意手术体位所致的损伤
B.血管吻合后为保证有效灌注和防止血栓形成，应使血压适度升高
C.术中不宜使用低分子右旋糖酐
D.为防止硬膜外血肿，血管吻合术中不宜局部使用肝素抗凝
E.为防止吻合血管破裂，应在血管吻合后保持较低血压
F.最好采用神经阻滞的方式行术后镇痛，以保持良好的镇痛和血管扩张状态
参考答案：C, D, E
完形填空（本大题共10小题，每小题1分，共10分） Most adults once studied at school, had classes and did their homework every day. The same ______ is going on at school now. _______ it seems that doing weekend homework is _______ problem for the modern students. All the students should agree that weekend homework should be abolished(取消). It's _______ for them studying at school five days a week. They have a lot of interests. With homework to do on Saturday and Sunday, when can they find _______ to help around the house, go and see a football or basketball game or a good film, join in family recreations(娱乐), or just have ______ at home? Because of these other activities, the homework can't be finished until _______. So their weekend homework is usually done in such a hurry that on Monday teachers are ________ and often threaten（威胁） to fail whole class of students because they know nothing about the ______. If there were no weekend homework for the students to do, they would be happy to go to school on Monday ______ having a good rest and to learn what the teachers teach.
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