press/push the right button(s) idiom
抓住要点，抓住要害（以获得所需结果）
to do exactly what is necessary to get the result that you want
You have to know how to push all the right buttons if you want to be a successful diplomat. 如果你想成为一个成功的外交官，你必须懂得如何抓住要害得到你想要的东西。