如何写开头段?

例.重复结论 扼要重述论据 转折(总论)

In this memo the vice president of Nature’s Way CNW), a chain of stores selling health food and health-related products, recommends opening a store in Plamesville. To support this recommendation the vice president cites the following facts about Plainesville: (1) sales of exercise shoes and clothing are at all-time highs; (2) the local health club is more popular than ever; and (3) the city’s schoolchildren are required to participate in a fitness program. Close scrutiny of each of these facts, however, reveals that none of them lend credible support to the recommendation.

开头段的小宝式写法(C-E-F)

Merely based on unfounded assumption and dubious (suspicious) evidence, the statement draws a conclusion that_____. To substantiate (support) the conclusion, the arguer points out evidence that_____. In addition, he indicates that_____. Furthermore, he cites the result of a recent survey in support of this recommendation. At first glance, the author’s argument appears to be somewhat convincing, but further reflection reveals that it omits some substantial concerns that should be addressed to substantiate the argument. In my point of view, this argument suffers from N logical flaws.