Customers often share personal experiences while they are shopping at my sister's horse-tack and riding-apparel store. Not surprisingly, safety is a primary concern when choosing equipment. Once, when I was helping out on the sales staff, a woman looking at head gear insisted on the best available.

"I've spent well over $100,000 on my brain and need to take good care of it," she said.

　　Alarmed, I asked, "Did you have a head injury?"

　　"No," she replied. "I graduated from college."

　　顾客们在我姐姐的马食和骑马服商店里买东西时，经常彼此交流个人经验。毫不奇怪，安全是在购买装备时考虑的一个主要因素。一次，当我在销售处帮忙时，一名挑头盔的妇女坚持要买最好的一种。

　　“我已经在我的脑袋上花了远不止十万美元，需要好好保护它，”她说。

　　我吃了一惊，问道：“你的头受过伤吗？”

　　“没有，”她说，“我从大学毕业了。”