测试场景：给出一个 200 行的混乱 Python 爬虫脚本，要求重构为面向对象结构，并输出 Mermaid 类图。
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.。Line官方版本下载对此有专业解读
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New York state has filed a lawsuit against Valve alleging that randomized loot boxes in games like Counter-Strike 2, Team Fortress 2, and Dota 2 amount to a form of unregulated gambling, letting users "pay for the chance to win a rare virtual item of significant monetary value."