七分学弟科技类话题需要解释一项技术怎样改变具体活动。先写原有过程、改变的环节和受影响的人，再讨论便利与限制，避免只说 technology makes life easier。
怎样解释因果关系
远程服务减少出行，不等于它能处理所有问题。把节省时间的机制解释清楚，再说明需要面对面处理的条件，论点就有明确范围。
常见表达怎样准确使用
reduce travel time 指减少出行时间；reliable internet access 强调稳定网络条件；in-person appointments 指面对面预约。描述作用时选择相符的动词，别把 access、replace 和 improve 混成同一个意思。
示范题
Online consultations are becoming more common in public services. Discuss the benefits and limitations of providing services this way.
示范段落
Online consultations can make routine services easier to reach for people living far from an office. They remove the need to travel simply to ask a question or discuss a document. This may save time for both visitors and staff. However, the advantage depends on reliable internet access and does not apply to tasks that require physical inspection.
怎样检查这一段
先遮住示范段落，用自己的话解释每句话的作用。再换一个细节重写，检查判断和依据是否仍然对应。不要只替换同义词；如果意思变了，要同时改理由。
接着练习
用 Task 2 结构检查 看段落与字数。