kd树的最快实现算法，经过了数次优化后，即使处理数十万个点，也仅仅需要几秒钟，内含使用说明。-kd tree algorithm to achieve the fastest, after a number of optimization, even hundreds of thousands of points. I only need a few seconds, intron use.

kd树的最快实现算法，经过了数次优化后，即使处理数十万个点，也仅仅需要几秒钟，内含使用说明。-kd tree algorithm to achieve the fastest, after a number of optimization, even hundreds of thousands of points. I only need a few seconds, intron use.