题目

阅读理解 The pursuit of longevity has long been on people's minds, prompting an abundance of research on the effects of food and diet on the human lifespan. According to recent research from the UC Irvine Institute, drinking coffee and wine could help you live longer. The 90+ Study evaluated more than 1,600 people over the age of 90 for their lifestyle habits and other qualities that might have contributed to their longevity. Participants were visited every six months, when they were given various tests. Researchers also collected information about the participants' diets, lifestyles, and 如果双曲线上一点P到它的右焦点的距离是8，那么点P到它的右准线的距离是（ ）A．10B．C．D．