1. If you have something at your fingertips, it is easily available for you to use or reach.
All basic controls are at your fingertips for straightforward, no fuss operation.
2. If you have facts or information at your fingertips, you know them thoroughly and can refer to them quickly.
She has figures about the performance of her business at her fingertips.
I need to have all the answers at my fingertips in case I'm questioned about the matter.
at your fingertips
近在手边；很容易得到；随时可供使用
He has all the latest statistics at his fingertips. 他手边有所有最新的数据。
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