If you struggle to get through the day without a constant supply of coffee or tea, it may be down to more than just personal taste. 如果你是这样一类人――每天如果没有喝上咖啡喝茶就会浑身不自在，其实这不单只是个人喜好这么简单。 Research shows some of us inherit genes which make us more reliant on caffeine. 科学家通过研究发现，体内的某些遗传基因导致了我们对于咖啡因更加依赖。 Those with the ‘caffeine addict’ genes need to drink more coffee or tea to get the same buzz. 这些体内携带有“对咖啡因上瘾基因”的人需要和更多的咖啡或茶来让自己精神振作。 This could also help to explain why chocolate is more irresistible to some than others. 着些许就能解释，为何某些人对于巧克力是如此的难以拒接。 The intriguing finding comes from a U.S. study scrutinising the DNA and diets of 45,000 people, one of the first to examine links between foods and genes. 美国的学者研究了45000人的基因后得出了这个有趣的结果，这也是首次探寻食物与基因之间的联系的实验。