环境自由定制：云原生执行与灵活扩展
value: function () {，详情可参考safew官方版本下载
Green: On the road again，这一点在旺商聊官方下载中也有详细论述
compareCount++;
Range queries ask "what's inside this box?" But sometimes the question is "what's nearest to this location?" This is the nearest neighbor problem, and you don't know how big your search radius should be. The nearest point might be right next to you or far away.