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【单选题】
德国研究人员进行的一项多中心、随机、双盲为期8周的平行组对照试验比较倍他乐克缓释片和比索洛尔的降压效果，其舒张压降压达标率的定义是
A.
给药后6小时静息舒张压<90mmHg的患者比例
B.
给药后12小时静息舒张压<90mmHg的患者比例
C.
给药后24小时静息舒张压<90mmHg的患者比例
D.
给药后24小时静息舒张压<95mmHg的患者比例
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【单选题】However, there was potential bias in the included studies, so the conclusion still needed further high quality（ ）(随机对照试验）to improve the evidence level.
A.
randomized treated trials
B.
randomized controlled trials
C.
randomized controlled examination
D.
randomly controlled trials
相关题目：
【单选题】However, there was potential bias in the included studies, so the conclusion still needed further high quality（ ）(随机对照试验）to improve the evidence level.
A.
randomized treated trials
B.
randomized controlled trials
C.
randomized controlled examination
D.
randomly controlled trials
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