I’ve noticed two odd things about my feet lately: They’ve grown a shoe size, and walking barefoot hurts on flat surfaces such as my kitchen floor. 我最近注意到自己的脚有两个问题：鞋要买大一码了，而且在厨房地板这样的平坦表面上光脚走路会痛。 Last year, I wrote a column about weird signs that you’re getting…