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Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00132-8
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Imagine a vast shopping mall parking lot with thousands of individual parking spots and internal lanes (representing road segments within a cluster). No matter how complex it is inside, there are usually only a few key exits to the main roads. Our goal was to identify these natural "exits" for each map cluster. For instance, the complex road network around Amsterdam Airport Schiphol (see on OpenStreetMap) has many internal roads but limited primary access points.
从“十五五”规划建议提出“持续巩固拓展脱贫攻坚成果”，到2026年中央一号文件明确提出“实施常态化精准帮扶”，着眼的正是确保长久守住不发生规模性返贫致贫底线。，更多细节参见下载安装汽水音乐