美国GRE 写作argument全部官方范文分析：第二部分范文分析第六篇文章。
第六篇文章
A recent survey of dental patients showed that people who use Smile-Bright toothpaste are most likely to have capped teeth -- artificial but natural-looking protective coverings placed by dentists on individual teeth.
Those people who had begun using Smile-Bright toothpaste early in life were more likely to have capped teeth than were people who had begun using Smile-Bright later in life.
In addition, those who reported brushing their teeth more than twice a day with Smile-Bright toothpaste were more likely to have caps on their teeth than were those who reported brushing with Smile-Bright less frequently.
Therefore, people wishing to avoid having their teeth capped should not use Smile-Bright toothpaste.
原文逻辑顺序：用SB的最易带牙套==〉早用比晚用SB的易带牙套，每天用两次SB的更易带牙套==〉想不带牙套就不用SB。
注：这篇文章大家一看肯定特别有亲切感，因为这和作文地带摸版和北美范文摸版非常的像!甚至，我怀疑，这就是后两者的原型。这些研究考试的人发现这篇文章具有很好的操作性，并看上去结构特别清晰。所以也就照葫芦画瓢。如果是这样的话，研究这个原版的价值就不言而喻了。
The argument contains several facets that are questionable. 段首句指出存在问题，同样没有过多的修饰，简洁明快。使文章迅速转移到后面的实质性分析。 First, the reliability and generalizability of the survey are open to quesiton. 指出第一个问题是调查类问题，并具体说出了是样本可信度和样本代表性，实际上这和后面的论证是对应的。 In addition, the argument assumes a correlation amounts to a causal relationship. 指出第二个问题，是因果关系。 The argument also fails to examine alternative explanations. 指出第三个问题，没有提出上面因果关系的他因。 I will discuss each of these facets in turn.第一段简洁明了，三个攻击点统领下面三段。这里对原文的复述似乎并不详细。因为原文的逻辑链很简单，作者不用向我们证明他读懂了，我们也知道他肯定读懂了。不像第五个范文那样，读个原题就得半天。实际上，这里的重点放在了后面的分析上，同时在后面的分析中也包含了复述原题中的每一个条件。
In evaluating the evidence of the survey, one must consider how the survey was conducted. 第一点：考虑调查类问题。分为两个分支论点，一个是有倾向的问题，一个是被调查者的代表性。 If the questions were leading or if the survey relied on self reports, the results might be unreliable -- people might just respond with the expected answer. 这里论证是否问卷中有loaded问题，方法为加条件后讨论。One must also consider how broad the survey was. 这里论证被调查者的代表性。方法还是加条件后讨论，三段式论证。 If the survey was limited to a few patients of a certain dentist, the results might be attributable to those particular individuals and that particular dentist.Hence, the generalization drawn might not apply to most people. 这又是典型的三段式论证：如果只是个别医生的个别病人==〉有可能归因于是个别现象==〉得到的结论无法推广到整体。 In addition, even if the survey was broader, one must consider whether it was limited in certain ways.看到这里，一下子就想起了作文地带，这正是他们极力推荐的层层让步式论证，后面一段也是这样的论证。论证方法为列举他因。For example, were the survey respondents old people?Was the survey limited to a certain city or geographic region?Factors such as these could explain the survey results and could undermine the generalizability of the survey results.举了两个他因，注意到这里用的是问句，官方范文是很喜欢用问句的。英语作文
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