立论：1、From the above described/ discussed/ mentioned/ talked/ said, it is not difficult to see why I hold this point of view.
2、From the above described/ discussed/ mentioned/ talked/ said, I can safely arrive at my conclusion----the statement in this Issue seems to be a bit partial.
驳论：In one word, the author’s/ writer’s/ speaker’s argument is actually unconvincing as it stands, thus suffering from critical queries. To strengthen the argument, the author/ writer/ speaker should offer the necessary, yet inherent link between the cause and effect. In addition, he or she should provide the convincing evidence to support his or her assumption/ assertion/ reasoning/ anticipation/ expectation.
立论的结尾段表明了作者的态度或立场，总体而言，立论的结论手法很大程度上是作者持异议或补充说明的态度。而驳论的收官之作是强调了答辩者对原作逻辑条理的某一缺陷、因果关系不相符合的点评并提出了一个不带个人观点的个人看法。总之，立论与驳论的结论或结尾必须贯彻首尾相顾的原则。即：你的引言段的立场必须与结论段的立场是一致的！