at one's finger's tips造一个常用的句子!

at one's finger's tips造一个常用的句子!
at one's finger's tips
造一个常用的句子!

at one's finger's tips造一个常用的句子!
i know something like the palm of one's hand ,at one’s fingertips
我对你的事已经了如指掌,你最好坦白你的罪行

The information is at your fingertip

Playing basketball is at my finger's tips. 我对篮球了如指掌（篮球对我来说很是小菜）

以上例子均可，任选其一。