+save(item: Item)
The quadtree is the two-dimensional case of a broader family of space-partitioning data structures. Octrees extend the same idea to three dimensions (splitting cubes into eight children), KD-trees use alternating axis-aligned splits (splitting along x, then y, then x again), and R-trees group nearby objects into bounding rectangles. Each variant makes different tradeoffs between construction time, query speed, and update cost.
，更多细节参见WPS官方版本下载
从传统的Web应用到现代化的微服务架构，技术栈的选择越来越多样化。，更多细节参见搜狗输入法2026
Nearly £50m of taxpayers' money has been paid by the NHS to an outsourced firm assessing claims of medical harm caused by vaccines, the BBC has found.
Первые матчи 1/8 финала пройдут 10-11 марта. Ответные состоятся через неделю. В составе ПСЖ выступает российский голкипер Матвей Сафонов. За «Буде-Глимт» в воротах играет его соотечественник Никита Хайкин.