Quartz 中文 关注 免费两日配送如何成为美国消费者期望的基准 亚马逊押注消费者愿意为速度提前付费,而数据表明他们确实更频繁地购买。竞争对手纷纷收购门店,只为跟上步伐。 How free two-day shipping became the baseline American shoppers expect qz.com Quartz 中文 RSS thenote.app