Add a cluster of points in one corner and watch that corner subdivide deeply while the rest of the space stays untouched. Then scatter a few points across the empty region and watch it split only where needed. The tree grows around the data.
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Exclusive: Former New Zealand PM ‘based out of Australia’, according to spokesperson, after rumours she was looking for houses in Sydney
优点：输出范围在 (0,1)，可以表示概率