如对注意力缺失或多动症用刺激剂等药物治疗，不是剂量过大就是剂量过少，这是因为我们并不善于判断哪一个孩子需要他们。

Medications like stimulants for attention deficit and hyperactivity are both over-prescribed and under-prescribed because we're not good at finding out which child needs them.

youdao

Now, if I was a person that was designing a vaccine and I noticed that this was the response that it got, that antibodies were produced, they reached some intermediate level, they started to fall, I would say, "Well I haven't stimulated the immune system enough, let me re-boost, let me give another dose of antigen."

现在,如果我正在研究一种疫苗,我注意到机体会对这种疫苗产生应答,也就是会产生抗体,当抗体浓度达到中等水平后,就开始下降,就可以说,疫苗对免疫系统刺激还不足,我需要提高抗原浓度,让我再把剂量再加大一倍

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