快速回答

结论：亲爱的小烤鸭，开头段决定第一印象，主体段决定分数上限。

亲爱的小烤鸭，开头段决定第一印象，主体段决定分数上限。很多烤鸭主体段写得像“观点堆砌”，一个中心句扔出去，后面两句敷衍解释，考官一眼看出逻辑链断裂。真正7+的主体段，是用不同功能的句型把“因果链”焊死的：中心句→解释→机制/举例→让步回扣。

PART-01 中心句 + 解释链

结构：①“The primary reason why [现象] is that [原因].” ②“This is because / In other words, [拆开讲].” ③“This happens when [具体情境], leading to [结果].”——主体段首句必须“一句话把一个论点砸实”，后面紧跟解释句，避免考官读完中心句还问“为啥”，再升级一步就是展示因果如何发生。

例句：“The primary reason why remote work has gained traction is that it offers employees greater flexibility. This is because workers can adjust their schedules to fit personal needs. This happens when commuting time is reallocated to deep-work blocks, leading to higher productivity per hour worked.”——把“灵活→通勤时间变深度工作时间→单位小时产出更高”这条因果链一步步摊开，考官看到的是“这个考生在认真论证，不是套模板”。

PART-02 举例不冷场

结构：“A typical example can be seen in [案例]”——延展一两句案例细节，最后回扣论点——“This point is best illustrated by the fact that...”。很多烤鸭举例就丢一句“For example, Apple.”然后没下文，这叫“举例未遂”。7+的举例要“案例+细节+回扣论点”三件套。

例句：“A typical example can be seen in Denmark, where wind power now supplies over 40% of the country's electricity. Unlike coal-dependent regions, Danish households benefit from stabilized energy prices and reduced carbon emissions. This point is best illustrated by the fact that, during peak wind periods, Denmark occasionally exports surplus electricity to Norway and Germany at a profit.”——例子不是“丹麦风电40%”就完事，而是补了“电价稳定+出口盈利”两个细节，再回扣到“可再生能源可行”这个论点上。例子有了“肉”，才算论证。

PART-03 让步反驳

结构：“Admittedly / While [对方合理面], [局限/代价]. However, [强化本方]. For this reason, [重申立场].”——这是7+必用句型，一篇作文至少要有一段让步，证明你“能看两边”不是一根筋。但让步之后必须回扣自己的立场，否则变成“帮对方打”。

例句：“Admittedly, introducing a universal basic income would place significant strain on national budgets, particularly in developing economies with narrow tax bases. However, the long-term dividends—reduced poverty cycles, lower administrative costs of welfare bureaucracy, and increased entrepreneurial risk-taking—outweigh the short-term fiscal burden. For this reason, a phased rollout, starting with targeted groups, is a more pragmatic path than outright rejection.”——Admittedly承认财政压力（对方合理面），However甩出三个长期收益，For this reason落到“分阶段推行”的折中立场。让步不是为了认输，而是为了让本方立场显得更周密。

小贴士

一段一论点，别在一段里塞两个中心句。因果链别跳步——“因为A，所以B”太短，加一句“This happens when...”把中间机制摊开。举例要给细节，光丢一个专有名词不够，补1-2句数据、情境或结果。让步不等于认输，让步后必须有however或nonetheless等转折。主体段每段80-120词为宜，太短论证不充分，太长容易跑题。