GMAT CR 首轮选项初步筛选
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五个选项快速抓重点，无关（或者方向明显相反）的直接在初步筛选时剔除，看似有关但是不确定细节的抓到选项重点后回去细部检查，二度删除。
“快速海选靠主题方向”->“剩余选项抓到重点后进行二度回文定位打击”就是Dustin实战中的逻辑做题思维。
什么是第一次该筛选掉的选项？
- 能够轻易判断出来的无关选项。
- 与题干所问态度相反的选项。（Ex. 问削弱给加强）
态度相反我知道，但是无关有哪些？
万一选项/结论长或复杂，怎样能成功抓到选项的重点？
然而，读选项的时候读懂“重点”是非常重要的。如果读错重点，就会搞错选项想强调的方向，很容易多想一层或少想一层，甚至选到简单的基础错误。
实战中结论主题跟每个选项快速抓重点的模式，其实就是一个词“是否…”。加上是否在念一遍，结论跟选项的强调重点就出来了。
例如：
Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives.However, since there are several winemakers who add sulfites to none of the wines they produce, people who would like todrink wine but are allergic to sulfites can drink wines produced by these winemakers without risking an allergic reaction tosulfites.
Which of the following is an assumption on which the argument depends?
(A) These winemakers have been able to duplicate the preservative effect produced by adding sulfites by means that do notinvolve adding any potentially allergenic substances to their wine.
(B) Not all forms of sulfite are equally likely to produce the allergic reaction.
(C) Wine is the only beverage to which sulfites are commonly added.
(D) Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.
(E) Sulfites are not naturally present in the wines produced by these winemakers in amounts large enough to produce anallergic reaction in someone who drinks these wines.
结论：people who would like to drink wine but are allergic to sulfites can drink wines produced by these winemakers without risking an allergic reaction to sulfites.
“人们喝这些厂商产的红酒就不会对sulfite过敏”加上“是否（是不是）”“是不是人们喝这些厂商的红酒就不会对sulfite过敏”这时你就可以直觉感受到，文章讨论的主题是：喝的人会不会过敏。
（这时简化可能会漏掉一些细节，所以等下需要根据选项抓到的重点反复回来二度定位。注意等下BCD的判断流程）
(A) These winemakers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.“厂商是不是可以不添加sulfite就达到防腐效益”
感受得出来重点在“酒是否能防腐”，跟主题“人是否不过敏”无关。
(B) Not all forms of sulfite are equally likely to produce the allergic reaction.“是不是并非所有的sulfite都会导致过敏”
感受得出来这个选项在强调各种sulfite之间是否有不同，但是有提到“人是否会过敏”->回文检查发现sulfite被视为一个整体叙述
(C) Wine is the only beverage to which sulfites are commonly added.“红酒是不是唯一一种加了sulfites的饮料”
感觉出来重点在“还有没有其他饮料”，且sulfite跟过敏有关->回文检查发现结论已框定范围在”would like to drink wine”
(D) Apart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.“是不是除了s之外还有其他物质会导致过敏”
感觉出来重点在“有没有其他物质”->回文检查发现结论已框定范围在”reaction to sulfites”
(E) Sulfites are not naturally present in the wines produced by these winemakers in amounts large enough to produce an allergic reaction in someone who drinks these wines.
