问题 单项选择题

9岁患儿水肿1个月就诊,实验室检查:尿蛋白(+++),24小时尿蛋白定量3.5g,为非选择性蛋白尿,补体C3降低。可能的诊断是

A.单纯性肾病

B.肾炎性肾病

C.急进性肾炎

D.IgA肾病

E.膜性肾病

答案

参考答案:B

解析:①患儿9岁为学龄儿童,病程1个月;②大量蛋白尿为非选择性;③低补体。首先考虑诊断为肾炎性肾病。鉴别诊断:①单纯性肾病:一般发病年龄为学龄前儿童,蛋白尿为选择性小分子蛋白尿;血补体正常。②急进性肾炎:是活动性肾炎和加速进行性肾功能减退。③IgA肾病:多见于学龄儿童,多为反复再发性血尿,肾功能多正常。④膜性肾病:常是难治性肾病,持续肉眼性血尿或高血压;病程中肾功能恶化;肾活检确诊。

阅读理解

阅读理解。

     "In only six days I lost seven pounds of weight."

     "Two full inches in the first three days!"

      These are the kinds of statements used in magazine,newspaper,radio and television ads,promising

new shapes and new looks to those who buy the medicine or the device.The promoters of products

say they can shape the legs,slim the face,smooth wrinkles,or in some other way to add to beauty or

desirability.

     Often such products are nothing more than moneymaking things for their promoters.The results

they produce are questionable,and some are dangerous to health.

      To understand how these products can be legally promoted to the public,it is necessary to

understand something of the laws covering their regulation.If the product is a drug,FDA(Food and

Drug Administration)can require proof under the Food,Drug,and Cosmetic Act that is safe and

effective before it is put on the market.But if the product is a device,FDA has no authority to require

premarketing proof of safety or effectiveness.If a product already on the market is a danger to health,

FDA can request the producer or distributor to remove it from the market voluntarily,or it can take

legal action,including seizure(查封)of the product.

      One notable case a few years ago involved an electrical device called the Relaxacisor,which had

been sold for reducing the waistline.The Relaxacisor produced electrical shocks to the body through

contact pads.FDA took legal action against the distributor to stop the sale of the device on the grounds

that it was dangerous to health and life.

      Obviously,most of the devices on the market have never been the subject of court proceedings

(法律诉讼),and new devices appear continually.Before buying,it is up to the consumer to judge the

safety or effectiveness of such items.

1.It can be inferred that the ads mentioned in the text are________.

A.objective  

B.costly

C.unreliable 

D.illegal

2.Which of the following is TRUE according to the text?

A.The court is in charge of removing dangerous products.

B.New products are more likely to be questionable.

C.The production of a device must be approved by FDA.

D.The promoters usually just care about profits.

3.FDA can ask for the proof of safety and effectiveness of a product________.

A.if it is a drug

B.if it is a device

C.if its consumers make complaints

D.if its distributors challenge FDA's authority

4.The Relaxacisor is mentioned as________.

A.a product which was designed to produce electricity

B.a product whose distributor was involved in a legal case

C.a successful advertisement of a beauty product

D.an example of a quality beauty product

5.The author intends to________.

A.make consumers aware of the promoters' false promises

B.show the weakness of the law on product safety

C.give advice on how to keep young and beautiful

D.introduce the organization of FDA