问题
单项选择题
再生障碍性贫血与阵发性血红蛋白尿最有鉴别意义的是( )
A.全血细胞减少
B.骨髓铁染色
C.尿含铁血黄素
D.骨髓增生低下
E.红细胞减少
答案
参考答案:C
解析: 阵发性睡眠性血红蛋白尿(PNH)由于血管内溶血而致贫血,有溶血性黄疸,骨髓中红系增生增多,尿沉淀含铁血黄素常呈阳性,如有发作的血红蛋白尿则更易鉴别。
再生障碍性贫血与阵发性血红蛋白尿最有鉴别意义的是( )
A.全血细胞减少
B.骨髓铁染色
C.尿含铁血黄素
D.骨髓增生低下
E.红细胞减少
参考答案:C
解析: 阵发性睡眠性血红蛋白尿(PNH)由于血管内溶血而致贫血,有溶血性黄疸,骨髓中红系增生增多,尿沉淀含铁血黄素常呈阳性,如有发作的血红蛋白尿则更易鉴别。
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More than twenty tons of ivory (象牙), seized from illegal hunters, was burned in Kenya to keep the ivory off the international market and to discourage the illegal killing of elephants for their ivory. The past 12 months had seen a record number of large ivory seizures across the world, a wildlife protection organization said Thursday, saying it had been a horrible year for elephants. There were at least 13 large seizures in 2011, totalling at least 23 tons of ivory meaning that about 2,500 elephants were killed. This compares to just six large seizures in 2010, weighing a total of just under 10 tons, and confirms a sharp rise in the trade since 2007. This is the worst year ever for large ivory seizures in the past 23 years-2011 had truly been a horrible year for elephants. Most illegal shipments of African elephant ivory end up in either China, where it is made into powder and used in traditional medicine, or in Thailand, with Malaysia the most frequent transit country (中转 国). The increasing quantities of ivory being traded, most of which are from either Kenyan or Tanzanian ports, reflected a rising demand in Asia. They constantly change their transport ways to Asia to avoid detection, including switching from airplanes to seaships, and once the ivory products arrive, their documentation (证明文件) is rewritten to hide the fact that they came from Africa. As most large ivory seizures fail to result in any arrests, the criminals are winning and have illegally made large amounts of money. International trade in elephant ivory was banned in 1990, and ETIS (the Elephant Trade Information System) holds the details of reports on more than 17,000 ivory and other elephant product seizures across the world since then.
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