But awareness that principles of evidence-based medicine should also guide health policy has been slower to take root. Here, although randomized trials are not feasible, it remains possible to follow evidence-based medicine’s primary rule: to base action on systematic summaries of the highest quality evidence available.
但是人们认识到循证医学的原理同样应该指引医疗卫生政策却花了很长时间。在这里，尽管随机疗法并不可行，但还是可以遵循循证医学的首要规则：基于可提供的最高质量的证据的系统性总结来进行行动。