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.
But you might think, the returned slice can’t be allocated on the
。快连下载安装是该领域的重要参考
In January, pollster YouGov released new data suggesting a majority of Britons now believe London is unsafe, but only a third of people surveyed in the capital agreed - and 81% of them said their own local area was safe.
Tony Jolliffe/BBC News