Researcher Dr Piper told The Independent, “If you reduce the diet of a rat by 40 percent it will live for 20 or 30 percent longer. So we would be talking 20 years of human life. This has shown on all sorts of animals, even Labradors (a kind of dog)．” The scientists are also studying fruit flies, which share 60 percent of human genes and age in a similar manner, and mice.

　　They have already made the healthy lifespan (寿命) longer in both flies and mice by using drug treatments and a balanced diet. It is hoped that this combination will also work to extend (延长) human life. Dr Piper said,

　　“If we discover the genes involved with aging, we should be able to delay aging itself. This is what we've found.”

　　He added that the_field_of_research_into_extending_life_is_only_ a_

　　decade_old,_so_remains_“in_theory”. It is their special approach to treating all age­related diseases caused by the “disease” of aging itself that sets their research apart.

　　文章介绍一个有关饮食与寿命长短的关系的研究。

　　1．The author writes this text in order to________.

　　A．encourage people to eat as little as possible

　　B．tell people how harmful food is to their health

　　C．introduce an on­going research on delaying aging

　　D．show how similar mice and humans are to each other

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