3. How many Americans suffered end-stage kidney failure and required dialysis or a transplant to survive twenty years ago according to an estimation?
A 400，000.
B 300，000.
C 200，000.
D 100，000.
4. What did the Archives of Internal Medicine call for doctors caring for heart patients to do?
A To examine their patients heart function carefully.
B To have their patients chests X-ra Yed regularly.
C To select volunteers from their patients for a kidney screening.
D To start rigorously checking out their patients kidneys.
5. Which of the following is NOT one of the three markers of kidney function?
A Levels of the protein albumin in the urine.
B Levels of the white blood cells in the blood.
C The rate at which kidneys filter blood.
D Whether one is anemic or not
答案与题解：
1.B 第二段第一、二句说到，加速慢性肾病的诊断所使用的方法就是尿检和血检，故B项为正确答案。
2.A 第三段第一句说。在估计患有慢性肾病的1，900万美国人呼叫很多人不知道自己患此病，可见A项是正确答案。
3.D 第三段最后一句说.终末期肾衰竭病人数日迅速增加，有40万人需要肾透析或肾移植才能存活.这个数字在近20年小每10年翻一番。按此计算，10年前应为20万人，20年前就应是10万人，故正确答案应为1)。
4.D 第四段最后一句说到，《内科档案》杂志号召为心脏病人治病的医生要开始严格地检查病人的肾脏，D项正是它要求做的事情。
5.B 第五段倒数第二句列㈩了肾功能的三个标志物.选项C、A、D均包括在内，唯独没有B项，故B项是本题答案。