本句中who wants to find the answer to the question, “what should I eat for good nutrition ?” 为主语the person 的定语从句，其中“what should I eat for good nutrition” 其中“what should I eat for good nutrition?” 是the question . might easily become lost及被省略去might easily become 以后的confused 和misled 则是主句的三个并列形式都是被动语态。

 

 

 

  本句是倒装句，主语是some reasonable, commonsense information ,somewhere in between 是表语。这里somewhere是副词，作表语。In between 是介词短语，修饰somewhere . 以引导that we …knowledge 为定语从句，修饰information.

 

 

 

本句由两个并列的强调句组成。 一句it is the nutrient that are essential; 另一句是it is food that normally provides them ,这句中的it is省略 了，而句中的them则指nutrients

 

 

They指前面提到的RDA,是本句的主语。Not average requirements 省略了系词are,与recommendations 一起构成并列表语。Health people 意为健康的人。

 

 

 这句中that provides…essential nutrients是定语从句，修饰a diet,而who consumes a diet that…essential nutrients 也是定语从句，修饰person。这复合句中的主语是a person is not necessarily getting a diet,  而 that is nutritionally inadequate也是定语从句，修饰diet。