fingertip

指尖、指端

She touched the wet paint lightly with her fingertips.

她用指尖轻轻碰了一下未干的油漆。

随手可得、唾手可得常与 at 连用

With this app, all the train schedules are at your fingertips.

有了这个应用程式，所有火车时刻表都随手可得。

了若指掌、如数家珍指知识

He has the whole company's sales figures at his fingertips.

他对全公司的销售数字了若指掌。