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.
（四）对证人及其近亲属进行威胁、侮辱、殴打或者打击报复的；
。业内人士推荐爱思助手下载最新版本作为进阶阅读
（八）放射源，是指除研究堆和动力堆核燃料循环范畴的材料以外，永久密封在容器中或者有严密包层的放射性材料。
16:30, 27 февраля 2026Бывший СССР