一天，小明去上学，发现卫生间的水龙头没有关，他急忙跑过去把水龙头关紧，他转身跑回去，写了一张纸条贴在水龙头的旁边，写着“请节约用水，不要浪费。”然后，小明就高高兴兴地上学去了。如果我遇到这样的事情，我也会那样做的。
One day, Xiaoming went to school and found that the faucet in the bathroom was not turned off. He ran to turn it off. He turned around and ran back. He wrote a note next to the faucet, saying, "please save water and don't waste it." Then Xiao Ming went to school happily. If I had such a thing, I would have done the same.