int key = arr[i]; // 待插入的元素
2025年三季度瑞幸成本与费用合计同比增长57%，高于营收增速，配送费涨至28.9亿元，同比大增211.4%，费用占比从9.1%跃升到18.9%。进入四季度，总运营费仍达119.6亿元，同比上升38.9%。
，更多细节参见PG官网
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