本世纪初的一天晚上，夜阑人静，在安谧的浙江海宁安澜书院里，一位老师正就着烛光，批阅着学生的课卷。突然，他看到一份课卷中“首施两端”一词。马上想起了《史记·魏其武安候列传》中武安“与长儒共一老秃翁，何为首鼠两端”一语时，自以为是学生笔误，于是提笔在课卷上作? One evening of the beginning of this century, the night was crowded. In a peaceful courtyard at Anlan Village, Haining, Zhejiang Province, a teacher was reading a book of candles with candlelight. Suddenly, he saw the word “both ends” in a class volume. Immediately remembered “Historical Records Wei Qibu An Hou Biography” in Wu’an “and Changru common old bald Weng, what is the head and mouse both ends,” a phrase, self-righteous is a student clerical error, then pick up the pen in the lesson?