因果在具体的段落论证中：说清楚你自己提出的某个“观点型”句子（往往就是结果）的原因，这就是论证中的“解释”/“展开”。
举个栗子
Choosing public transport is more eco-friendly.（这是一种“观点型”表述，也是一种“结果”，即选择公共交通对环境更友好）As private cars are replaced by public transport, such as the bus and subway, a less amount of waste fuel and pollutants will be released.（这是原因。如果不说原因，那么“公共交通对环境更加友好”这个点就站不住脚，因为为什么更加友好没有解释）Obviously, a more livable environment will be created, making it more possible for citizens to enjoy a healthy life.（进一步的结果，也就是“more eco-friendly”这个变化带来的结果：环境更加宜居，人们更加有可能过上健康的生活）
我们再来看一个栗子
雅思大作文题目：
Some people think that teachers should be responsible for teaching students how to judge right and wrong and how to behave well. Some say that teachers should only teach students knowledge from academic subjects. Discuss both views and give your opinion.
通过因果论证来展开：
For one thing, offering academic knowledge contributes to students' achievement.（中心句） When students have a good command of academic subjects such as Mathematics and Physics, they are more likely to succeed in the examinations to obtain the priority to further education.（这个when引导的状语从句其实是一句“假设+发生情况”型的表述，也就是“在何种情况下，得到了何种结果”，本质上也是一种因果论证） If they fail to master the knowledge, it is difficult to seek a bright future.（这句话同上一句，两个因果论证“一正一反”地论证了学习学术知识和获得成就之间的关系）
合理使用因果论证，会让你的主体段逻辑无敌，想拿高分自然更有可能啦！
