Unit2:
1. 大多数缺铁的人并不知道他们缺铁。
   Most people with low iron reserves don’t know they have an
iron deficiency.
2.   仅仅查出运输氧气的血液蛋白的含量是不够的。It                is  not
sufficient only to check levels of the blood protein that transports
oxygen.3. 男性也不安全，尤其是那些吃肉少、运动量却很大的男
性。
Men are not safe, especially those who eat little meat and have a
high level of physical activity.
4. 属于这些类型的人,最好每年做一次血液检查,看看体内铁质的储
量如何.It’s advisable for people in these groups to have a yearly
blood test to check blood iron reserves. ...