这段话有观点、有原因、有例子，为什么还是没讲清

先看一段教学示例：

Remote work improves efficiency because employees do not commute and can focus better. For example, programmers at home can finish projects faster.

它看起来已经有观点、原因和例子，读完却仍然单薄。

第一句的“效率”范围太宽。是单位时间产出更多、错误更少，还是工作时间更灵活？第二句从“不通勤”直接跳到“更专注”，没有说明节省的时间如何改变工作状态。最后的程序员例子只是把“效率更高”换成“完成更快”，没有提供新的观察。

可以把论点收窄，并让例子承担解释任务：

Remote work can improve concentration for employees whose tasks require long periods of uninterrupted attention. Without a daily commute, they may begin complex work with more time available and can arrange quiet periods around meetings. A software developer, for instance, could reserve the first two hours of the morning for reviewing and testing code before team calls begin. In this situation, the benefit comes not simply from being at home, but from protecting focused working time.

这个版本没有虚构调查或精确效果。它先限定适用对象，再解释可用时间如何转化为专注，例子则把“安静工作时段”变成一个可以想象的场景。

主体段不必机械凑齐三个部件。有时不需要例子，有时要先承认条件或反例。真正要检查的是：读者能否沿着你的句子，从主张走到原因，再看到这个原因在什么情境下成立。