【新地平线英语】（第三册）铁质与运动的关系(5/8)

英语自学网

概述：
        人们认为，只要不到第三阶段就不会有什么问题。这种想法是不对的。。。
        Hints:
        John L. Beard
        Purdue
"People think that if they're not at the third stage, nothing is wrong, but that's not true," says John L. Beard, who helped design the Purdue study. "You're not in stage three until your iron reserves go to zero, and if you wait until that point, you're in trouble."
However, most people with low iron reserves don't know they have a deficiency, because traditional methods of calculating the amount of iron in blood by checking levels of the blood protein that transports oxygen are not sufficient, Beard states. Instead, it's important to check levels of a different compound, which indicate the amount of storage of iron in the blood.“人们认为，只要不到第三阶段就不会有什么问题。这种想法是不对的。”帮助设计普渡大学研究的约翰•L.比尔德说。“只有当你的铁储量为零时，你才会进入第三阶段。而你若坐等到这个时候，你的麻烦就大了。”
然而，比尔德指出，大多数铁质储量低的人并未意识到自己缺铁，因为传统的检测血液中铁含量的方法──检验血液中输送氧气的血蛋白的含量──是不够的。其实，有必要检查血液中另一种混合成分的含量，它可以显示血液中的铁含量。