The tree starts as a single region covering the whole space. As points arrive, they get dropped into the region that contains them. When a region exceeds its capacity (the maximum number of points it can hold before splitting), the region divides into four children, and the existing points get redistributed.
正在进行的第三轮第五批中央生态环境保护督察15日通报典型案例，指出北京市怀柔、昌平等区生态保护和修复治理要求落实不够、监管不到位，生态修复滞后等问题仍然存在。
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Цены на нефть взлетели до максимума за полгода17:55
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In May last year, the 64-year-old announced she had diagnosed with stage four Mantle cell lymphoma, a "fast-moving" form of blood cancer.
Сайт Роскомнадзора атаковали18:00，更多细节参见safew官方版本下载