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【单选题】
合并高血压者,为保证手术较为安全,在麻醉前准备中,应控制血压稳定在A.
血压接近正常,160/100mmHg以下，可不必作特殊处理，高于180/100mmHg,术前用合适的降压药物
B.
收缩压低于20.0kPa（150mmHg），舒张压低于10.7kPa（80mmHg）
C.
收缩压低于21.3kPa（160mmHg），舒张压低于12.0kPa（90mmHg）
D.
收缩压低于21.3kPa（160mmHg），舒张压低于13.3kPa（100mmHg）
E.
收缩压低于24.0kPa（180mmHg），舒张压低于13.3kPa（100mmHg）
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