// 倒序遍历：从最后一个元素开始（核心思路！易错点1）
On a cold February afternoon in Manchester, queues of concert-goers are braving the elements outside Co-op Live, the UK's largest indoor arena.
。同城约会是该领域的重要参考
London has the highest number of rough sleepers -1,277 - but the rate of rough sleeping rose steepest year-on-year in the north east of England, where numbers increased by 31% to 162.
Nature, Published online: 25 February 2026; doi:10.1038/s41586-026-10127-0
"It's very serious and not to be taken lightly."