This ensures that for our original extract code, if the number of
Suppose you're building a map application. You have millions of restaurants, gas stations, and landmarks, each with a latitude and longitude. A user taps the screen and asks: "What's near me?"
，这一点在一键获取谷歌浏览器下载中也有详细论述
The website you are visiting is protected.
// Synchronous source from in-memory data