目录1. 前言2. 计算经纬度坐标间的距离3. 根据经纬度坐标距离排序4. 经纬度范围查询1. 前言
If one could put an array of pointers to child structs inside unsafe structs in C# like one could in C, constructing complex data structures without the overhead of having one object per node would be
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