先读框架：主旨先于细节
7 分钟
Academic exam passages are engineered: the first paragraph introduces a topic and usually ends by signaling the passage's direction; each body paragraph opens with a sentence stating its job; the details exist to support that sentence. Skimming is not reading fast — it is reading only the frame: the full first paragraph, the first sentence of each body paragraph, and the final two sentences. This takes about 90 seconds and answers three questions: What is the topic? What does each paragraph do? Where is everything located? You are building the map you will navigate with while answering questions.
学术类考试文章是精心设计的：第一段引入话题，通常在结尾点明文章走向；每个主体段的首句说明本段的任务；细节都是为这一句服务的。略读不是快速地读，而是只读框架：完整的第一段、每个主体段的首句、以及最后两句。这大约需要 90 秒，并回答三个问题：话题是什么？每一段在做什么？各个信息在哪里？你是在绘制答题时用来导航的地图。
例题讲解
First sentences of a five-paragraph passage: (1) "Cities are consistently warmer than the rural areas that surround them…" (2) "The most important cause is the replacement of vegetation with paved surfaces." (3) "The geometry of cities intensifies the effect." (4) "The consequences are not evenly shared." (5) "Cities are experimenting with remedies."
From five sentences you already know the passage's architecture: definition → cause 1 → cause 2 → consequences → solutions. Now suppose a question asks why the effect is strongest at night. "Strongest at night" is about how the effect works — so it must live in paragraph 2 or 3, the cause paragraphs. You go directly there instead of re-reading everything. That location step is the entire payoff of skimming.
只凭五句话，你已经知道文章的结构：定义 → 原因一 → 原因二 → 影响 → 对策。现在假设有道题问：为什么这一效应在夜间最强？"夜间最强"关乎效应的机制——所以答案一定在第二或第三段（原因段）。你直接去那里，而不是重读全文。这个"定位"步骤就是略读的全部回报。