curl -L https://nodejs.org/dist/v22.14.0/node-v22.14.0-darwin-x64.tar.gz -o node.tar.gz
Quadtrees are everywhere spatial data exists. Mapping services use quadtree-like tile pyramids to serve map tiles at different zoom levels (Bing's quadkey system, for example, addresses tiles as base-4 paths). Game engines use them for collision detection and visibility culling. Geographic information systems use spatial indexes to store and query spatial datasets. PostGIS uses GiST indexes (R-tree-style) for spatial queries on geometries, while PostgreSQL's core supports quadtree-like SP-GiST indexes for certain data types like points.
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这个判断在整个VC圈子里正在成为共识。Bain Capital Ventures的合伙人说了一句很有意思的话：投资物理世界的AI改造，过去十年一直是"大家觉得有道理但没人真的信"，到了2025年突然变成了所有人都在谈的事。数据印证了这个转变——2025年机器人领域的VC投资同比增长69%，达到222亿美元，预计2026年还会再翻一倍。
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