在药物研究中，一些参与者服用的是真正的药物，而另一些人只获得了安慰剂。

In the drug study, some participants took real medication while others were given only ___placebos.

这些安慰剂般的承诺并不能真正解决员工的不满。

These ___placebos of promises won't actually address the employees' grievances.