4．B　解析：写作意图题。综合全文，尤其是根据文章最后一段的最后一句可知，西方饮食有害健康，不利于环境，故作者是想通过该文让人们警惕西方饮食带来的危害。

　　B

　　(2015·泰安高三质检)Any day we wish；we can discipline ourselves to change it all.Any day we wish；we can open the book that will open our mind to new knowledge.Any day we wish；we can start a new activity.Any day we wish；we can start the process of life change.We can do it immediately，or next week，or next month，or next year.

　　We can also do nothing.We can pretend rather than perform.And if the idea of having to change ourselves makes us uncomfortable，we can remain as we are.We can choose rest over labor，entertainment over education，delusion(幻想)over truth，and doubt over confidence.The choices are ours to make.But while we complain about the effect，we continue to nourish(助长)the cause.

　　As Shakespeare uniquely observed，“The fault is not in the stars，but in ourselves.” We created our circumstances by our past choices.We have both the ability and the responsibility to make better choices beginning today.

　　Those who are in search of the good life do not need more answers or more time to think things over to reach better conclusions.They need the truth.They need the whole truth.And they need nothing but the truth.

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