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1.7#楼基坑超3米无支护，坑边违规堆载， 且7号楼、8号楼基坑一次开挖到底，未采取有效支护措施或放坡喷锚措施。（违反《房屋市政工程生产安全重大事故隐患判定标准（2024版）》第五条第二款、第十四条第二款，属于重大事故隐患。）。业内人士推荐safew官方版本下载作为进阶阅读
Regions with many nearby points keep subdividing. Regions with few or no points stay large. The tree adapts to the data: dense areas get fine-grained cells, sparse areas stay coarse. The split grid is predetermined (always at midpoints), but the tree only refines cells that need it. Sparse regions stay as single large nodes while dense regions subdivide deeply.，详情可参考heLLoword翻译官方下载
FT Edit: Access on iOS and web，推荐阅读im钱包官方下载获取更多信息
栈（stack）是先进后出的数据结构。单调栈在入栈时通过一定规则保持栈内元素有序（单调递增或单调递减），从而把「找左侧/右侧第一个更大/更小元素」从 O(n²) 降到 O(n)。