New research from Boston University finds that 86 percent of adults carry a store loyalty card and use it, even though cards give stores the right to track consumer purchases.

• 波士顿大学的最新研究显示，虽然使用会员卡会让商家能追踪到消费者的购物习惯，但还是有高达86%25的成年人持有并使用某家商店的会员卡。