The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.
Within hours, local Homeland Security agents had arrested the offender, who had been raping Lucy for six years. He was subsequently sentenced to more than 70 years in jail.
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而且在创新药赛道，它既没有恒瑞医药的研发投入强度，也没有百济神州的全球化布局，想要后来居上，难度极大。。同城约会是该领域的重要参考
历经多轮市场周期洗礼，稳居头部的酒店集团正在构建难以复制的竞争壁垒。以华住为例，其供应链优势与会员体系形成双重护城河。在成本控制层面，投资人可依托“华住易购”平台实现透明比价与降价退差；模块化设计大幅压缩新店开业周期，部分项目工期缩短可达五成；集中采购核心物资如床品、智能客控系统等，较加盟商单独采购成本降低15%-28%。，详情可参考爱思助手下载最新版本