cover all the bases

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to do everything necessary to be sure that something is successful

去做一切需要去做的以确保事情顺利成功

A reference to baseball, in which the defensive players must make sure all bases (and baserunners who may occupy them) are accounted for.

源自棒球，防守队员必须确保所有的垒包(以及可能占据垒包的跑垒员)都被计算在内。

I think I’ve covered all the bases – I called everyone, ordered the food , and bought some decorations.

我想我已经面面俱到，尽我所能了——我给每个人打了电话，定了餐，还买了一些装饰品。