The answer is the "gold standard" double blind, placebo controlled study.

答案是“金标准”，双盲，安慰剂对照研究。

youdao

So, in fact, this double blind placebo controlled study does not guarantee safety or efficacy because the test leaves far too many questions unanswered.

所以实际上，双盲对照研究并不会保证疗效和安全，因为它留下太多无法回答的问题。

youdao

As a research target, autism has suffered from companies' reluctance to run large placebo-controlled trials.

作为一项研究目标，自闭症研究正遭遇瓶颈，制药公司们不愿意进行大规模的安慰剂对照试验。

youdao

It was properly powered,randomized and placebo-controlled and really provides evidence for the use of oxygen in cluster headaches,"

VOA: standard.2009.12.17

They had to give some of them the real vaccine and some of them a placebo vaccine in order that they could really tell if the vaccine worked; you have to have it placebo controlled.

研究者们还须给部分孩子接种真正的疫苗,给另外一些孩子接种空白疫苗,以分辨疫苗是否真的有效,所以你必须使用安慰剂作对照

耶鲁公开课 - 生物医学工程探索课程节选

Indeed, it is why many early medical advances became standard of care without anyone seeing the need for a placebo controlled experiment.

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This study is actually the first of four placebo-controlled, Phase III trials to be completed.

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If the drug is approved, it may make it difficult to conduct that placebo-controlled trial.

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