答案是“金标准”，双盲，安慰剂对照研究。
The answer is the "gold standard" double blind, placebo controlled study.
方法采用随机双盲、安慰剂平行对照研究。
Methods A random, double blind, and placebo control study was conducted.
方法：采用随机、双盲、安慰剂对照的方法进行研究。
Method: Take the method of random, double blindness and placebo control for research.
这些数据来自一个随机、双盲、安慰剂对照试验、根据研究。
The data are from an extension study of a randomized, double-blind, placebo-controlled trial.
这些数据来自一个随机、双盲、安慰剂对照试验、根据研究。
The data are from an extension study of a randomized, double-blind, placebo-controlled trial.
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