话说大宋年间，京城郊外有一位年轻的县令，名叫李知府。他刚正不阿，执法如山，深受百姓爱戴。一日，县衙门接到了一个棘手的案子：富商赵员外家的独子赵公子，因醉酒斗殴致人重伤。赵员外权势熏天，百般阻挠，试图以钱财收买李知府，但李知府却凛然不惧，秉公执法，依法判处赵公子入狱。赵员外气急败坏，多次上告，甚至扬言要将李知府罢官，李知府却始终不为所动，坚持公正执法。最终，赵公子受到了应有的惩罚，李知府的公正廉洁也得到了百姓的赞扬，他的行为如同大山一样，坚不可摧。
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