cover all the bases idiom
(US cover the bases)面面俱到
to do everything necessary to be sure that something is successful
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。