After all, it's hard to do a double-blind test when the subjects can see for themselves whether or not the light is on.

毕竟，要做双盲测试是很困难的，因为受试者自己可以看到灯是否亮着。

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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。

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Methods The test was randomized, double-blind, parallel study.

方法本试验为随机双盲对照研究。

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