今天的句子：
There is now good evidence that a host of things—such as what you ate for your last meal or whether you eat bread on its own or with protein—can affect blood sugar levels. “The utility of the glycaemic index is very limited,” says Patterson. “People think, ‘well, if I consume this food that is low GI, it’s going to be healthier for me’, when in essence, you don’t know how you’re going to respond to that food.”
思考题：
According to the text, the glycaemic index__. A. can vary from people to people B. has gained little usefulness C.has been beyond our control D. has not been adopted by doctors
词汇突破：
a host of:一系列的
protein：蛋白质
utility:运用
glycaemic index:升糖指数
in essence：本质
句子解析：
第一句：
There is now good evidence that a host of things—such as what you ate for your last meal or whether you eat bread on its own or with protein—can affect blood sugar levels.
参考译文：现有充分的证据表明，很多事情——比如上一餐吃了什么，或者你是单独吃面包还是和蛋白质一起吃——都会影响血糖水平。
第二句：
“The utility of the glycaemic index is very limited,” says Patterson.
参考译文：“升糖指数的效用非常有限，”帕特森说。
第三句：
“People think, ‘well, if I consume this food that is low GI, it’s going to be healthier for me’, when in essence, you don’t know how you’re going to respond to that food.”
参考译文：“人们会想，‘好吧，如果我食用这种低升糖指数的食物，它对我来说会更健康’，而实际上，你不知道自己会对这种食物做出什么反应。”
思考题解析：
According to the text, the glycaemic index__.
A. can vary from people to people
（因人而异）
A选项正确。
B. has been beyond our control
（已经不被我们控制了）
B选项错误。
C. was proven to be not useful
（被证明无用）
C选项错误。
D. has not been adopted by doctors
（并未被医生采纳）
D选项错误。
文章来源背景和来源：
Glycaemic index doesn’t reliably predict blood sugar
升糖指数不能可靠地预测血糖
Source: https://www.newscientist.com/article/2326018-glycaemic-index-is-a-poor-predictor-of-how-foods-raise-blood-sugar/
背景：升糖指数（GI）是近年来非常流行的健康概念，人们已经逐渐习惯用它来把食物分为三六九等。升糖指数的原理非常简单：基于食物摄入后影响血糖的水平来给它们打分，高于70的为高升糖食物，而低于55的为低升糖食物。然而，最近的一份研究显示，每个人代谢食物的方式都不同，同样的白面包，63位受试者摄入后测出的升糖指数从35到103不等，即白面包可以既是低升糖又是高升糖，得看是谁吃的。另外，对于同一人来说，在测试之前的饮食习惯，以及摄入当时的食物搭配也会影响升糖的结果。专家表示，GI有一定的参考价值，但只是食物的一个属性，我们在选择食物时不能盲从，还需根据自身条件综合判断。
