美国医师执照考试丛书：儿科学（第12版）_（美），叶特曼，（Robert J.Yetman），（美），郝曼编_9787811168617

　　为了帮助有志于参加USMLE的考生更好地复习，北京大学医学出版社全面引进了McGraw Hill公司的两个著名USMLE复习品牌丛书：PreTest系列、FIRST AID系列。这两套丛书经过多次再版，受到世界各地考生的欢迎。本次引进的均为其最新版本。
　　《儿科学（第12版）》为《PreTest系列》之一，全书采用精练、简明的语言，以图文结合的形式系统介绍了儿科学的内容。非常适合有志于参加或欲了解美国医师执照考试的中国医学生和医生参考使用，也可供广大医药院校师生学习专业英语参考。

　　37. The answer is b. （Hay et al, pp 216-217. Kliegman et al, p 350. Rudolph et al, p 364.） Poisoning with clonidine is becoming more commonplace since it is used not only in adults for hypertension but in some children for attention-deficit/hyperactivity disorder and tic disorders. Symptoms described in the vignette often occur within I hour of the ingestion. Treatment includes aggressive PICU support and naloxone （which has variable effect）. Young children often ingest poisons and drugs during times of household disruption. Visitors handbags are a great temptation for the inquisitive toddler. Deferoxamine is used to treat iron overdose and Nacetylcysteine treats acetaminophen ingestions. In addition, Aunt Mary should be encouraged not to carry organophosphates （antidote is atropine） and arsenic （antidote includes dimercaptosuccinic acid） in her purse along with her other medications.
　　38. The answer is d. （Hay et al, pp 232-233. Kliegman et al, pp 2913-2918. McMillan et al, pp 767-772. Rudolph et al, pp 23-24.） Impaired cognitive function can occur at blood lead levels previously thought to be safe; the toxic concentration of lead in whole blood was revised downward in 1991 from 25 μtg/dL to 10 μtg/dL. The blood erythrocyte protoporphyrin concentration is not elevated in such low-level poisoning rendering this test useless as a valid screening test. The definitive screen, then, is the blood lead level, preferably via venous sampling which avoids the risk of environmental contamination with lead that is more likely with finger sticks. Most lead poisoning is clinically inapparent. A careful history will help to identify sources of lead in the environment. However, neither the history nor the anemia that accompanies severe lead poisoning is an appropriate means of screening for lead poisoning. In most areas, lead screening recommendations are made by the state or local health department, based on local risk factors （eg, number of older houses potentially containing lead-based paint）.

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