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研究顯示，自我控制是影響老年人手機成癮的重要因素。對於老年人群體而言，「因生理機能、認知能力日趨衰退，所以無論是自我資源還是心理狀態都不及年輕人群，因而自我控制能力可能也會衰退，進而手機成癮等行為也可能增加」。這意味着，當短視頻不斷推送新內容時，老年人在「停下來」這件事上不僅是意願問題，也與生理機能和認知能力的衰退導致的自我控制能力下降有關。
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These red or pink dots can appear anywhere on the body, including inside the mouth.
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.