[64]全国居民五等份收入分组是指将所有调查户按人均收入水平从低到高顺序排列，平均分为五个等份，处于最低20%的收入家庭为低收入组，依此类推依次为中间偏下收入组、中间收入组、中间偏上收入组、高收入组。
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В Финляндии предупредили об опасном шаге ЕС против России09:28
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Quadtree-based image compression formats and level-of-detail systems all work this way. Satellite imagery, terrain rendering, and geographic information systems use quadtree decomposition to serve data at varying resolutions: zoomed out, you see large coarse blocks; zoomed in, you see fine-grained tiles. The same principle extends to three dimensions (octrees) for volume rendering and 3D spatial indexing.