FT Digital Edition: our digitised print edition
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这场寻亲，也如石子投入静水，在家族中漾开涟漪。杜耀豪的纪录片成了与散落各地的表亲保持联系的纽带。当他动身前往汕头时，也将消息更新给香港和洛杉矶的亲戚。他的母亲最为激动，因为这是“她母亲的故事”。在德国时，母亲从未提及外祖母有个叫林木通的弟弟，直到杜耀豪踏上寻亲之路，她的记忆仿佛被突然唤醒。也是在杜耀豪开始寻根后，母亲才从家中找出了那张全家福。
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.