Every point gets examined, regardless of where it sits. Points on the opposite side of the map get the same treatment as points right next to the query region. We're doing a lot of unnecessary work.
FirstFT: the day's biggest stories，推荐阅读safew官方版本下载获取更多信息
，更多细节参见同城约会
Opens in a new window。safew官方下载对此有专业解读
cd ~/www/anqicms