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.
当杜耀豪把家族老照片发去，屏幕那头传来确认，这就是他们的亲戚。，详情可参考51吃瓜
。同城约会对此有专业解读
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"""HTTP客户端 - 封装网络请求逻辑"""，更多细节参见safew官方版本下载