用汉文帝刘恒与冯唐故事.据《汉书·冯唐传》记载：云中太守魏尚治军有方,"使匈奴远避,不近云中之塞",一旦入侵,必所杀甚众.后因报功时"虏差六级"多报了六颗首级,被文帝"下之吏,削其爵".冯唐竭力为魏尚辩白,认为文帝"...