前两天去拜望一位外国朋友,不巧他正在感冒。问其原因,他说可能是水土不服。我说什么水土不服,是穿得太少。北方的冬天,滴水成冰,我们都会把自己穿成企鹅一样,可这位老兄竟然只穿着一身单衣,不冻病才怪。可朋友说在自己国家,冬天大家都是这样穿的,从来不感冒。我跟他开玩笑,这是在中国,要入乡随俗啊,疾病也欺生,还是多穿点衣服吧! Two days ago to visit a foreign friend, unfortunately, he is cold. Asked the reason, he said may be acclimatized. I say what acclimatized, is too little dress. The winter in the north, dripping ice, we will wear their own into a penguin, but this guy actually only wearing a uniforms, not frost disease strange. Friends can say in their own country, winter we all wear this way, never cold. I joking with him, this is in China, as the Romans do, disease is also deceived, or wear more clothes now!