The simplest approach is to check every single point. Compute the distance from the user's location to every restaurant in the database, keep the ones that are close enough, and throw away the rest.
Intel's 1986 ICCD paper Performance Optimizations of the 80386 reveals how tightly this was optimized. The entire address translation pipeline -- effective address calculation, segment relocation, and TLB lookup -- completes in 1.5 clock cycles:。快连下载-Letsvpn下载对此有专业解读
▲ 图源：Android Central。关于这个话题，雷电模拟器官方版本下载提供了深入分析
回家过年前，我还特意体验了一家L4级无人驾驶出租车的服务：从上海世纪公园东南角前往上海科技馆地铁站——某上市运营商在浦东新区画出了一块面积不大的运营范围，两年前我曾在广州南沙体验过他们的服务。