argu35

35.The following appeared in the summary of a study on headaches suffered
by the residents of Mentia.

"Salicylates are members of the same chemical family as aspirin, a
medicine used to treat headaches. Although many foods are naturally rich
in salicylates, for the past several decades food-processing companies
have also been adding salicylates to foods as preservatives. This rise in
the commercial use of salicylates has been found to correlate with a
steady decline in the average number of headaches reported by participants
in our twenty-year study. Recently, food-processing companies have found
that salicylates can also be used as flavor additives for foods. With this
new use for salicylates, we can expect a continued steady decline in the
number of headaches suffered by the average citizen of Mentia."

水杨酸酯和用来治疗头痛的药物--阿司匹林是同一类化合物。尽管很多食品天然富含水杨酸酯，过去几十年中食品加工公司仍然在食品中加入它来作为防腐剂。这种水杨酸酯在商业上的使用被发现与我们为期20年研究的参加者所报告的头痛发病的平均数量下降是相关的。最近，食品加工公司发现水杨酸酯也可以被用作食品香料。根据这种水杨酸酯的新用途，我们可以预期Mentia居民患头痛症的数量将会持续稳步下降。

1.S和A属于同一类化合物，不能够确保他也能够治头疼。

2.研究问题：1）有可能报告的人数很少，很多人头疼也没有报告。2）也有可能头痛发病平均数量的下降是由于其他因素导致的，例如生活水平，食物中的其他化合物等。

3.即便S能够治疗头痛，S被用作食品香料后有可能会破坏原来的结构，以至于失效。

4.即便有用，随着生活压力的增大，生活节奏的加快，工作压力的增加都可能会导致头痛病发作，不一定有新用途就能保证患头痛病的数量会稳步下降。