1N-COUNT [usually plural]指尖 Your fingertips are the ends of your fingers. 指尖
The fat and flour are rubbed together with the fingertips as for pastry.
像做油酥面团那样用指尖把脂油和面粉揉搓到一起。
2PHRASE 近在手边;随时可用 If you say that something is at your fingertips, you approve of the fact that you can reach it easily or that it is easily available to you. 近在手边;随时可用 [approval]
I had the information at my fingertips and hadn't used it.