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.
短視頻佔據了他們的大部分時間。在使用結構中，短視頻時長佔比高達35.1%。一項研究樣本數據顯示，「幾乎每天使用短視頻」的老年人佔87.1%，每日使用超過2小時的佔48.3%。中國老齡協會網站發布的問卷調查顯示，約59.57%的受訪老年人「有網絡成癮趨勢」。。关于这个话题，safew官方下载提供了深入分析
union alloc_header{，详情可参考WPS官方版本下载
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（三）组织座谈、听证、统计、评估；