下列关于输血的说法中错误的是
A．成分输血既提高了输血治疗的效果，又避免了血液浪费
B．健康成年人每次献血200-300毫升不会影响健康
C．AB血型的人只能给同血型的人输血
D．大量输血时，如无同型血，O型血的人是万能输血者
答案：D
题目分析：输血以输同型血为原则，例如：正常情况下A型血的人输A型血，B型血的人输B型血，但在紧急情况下，如果实在没有同型血，AB血型的人可以接受任何血型，O型血可以输给任何血型的人，如果异血型者之间输血输得太快太多，输进来的凝集素来不及稀释，也可能引起凝集反应，因此，输血时应该以输入同型血为原则，异血型者之间输血，只有在紧急情况下，不得已才采用，因此首先考虑的是输同型血，所以D的说法是错误的。
点评：此题为基础题，较易，解答此题的关键是熟记输血的原则是同型输血。
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| Chairman Mao once said, "It is not hard to do one good deed. It is hard to do good deeds all your life." Guo Mingyi, a 52-year-old worker in Anshan, Liaoning did just that. Over the past 20 years, Guo 1 60,000 mL of blood (血). That is the blood of 10 people put together. Once, 2 the cold winter of 2009,Guo got a call from the hospital. The doctors told him 3 a patient needed a blood donation. Guo didn't have time to have lunch. He traveled in the snow to 4 the hospital. When he finished donating the blood, he was 5 tired that he fell asleep on the hospital bed. Guo and his family live a 6 life. They live in a house of only 40 square meters. 7 they don't have a lot of money, Guo saves money to support poor children. In the past 16 years, he has given away over 100,000yuan to more than 180 poor students. When the parents met him, many cried, "He looks 8 than us."they said. Guo has also offered help to thousands of workers, friends and strangers. His warm heart has moved many people. They 9 him a "Modern-Day Lei Feng". Recently, Chinese leaders called on people to learn from Guo. They say young people especially should learn his selfless devotion (奉献). But Guo said he did these things in order not to get famous. "It's just that some people need some help, and there should be someone standing out to give 10 a hand." he said. | ||||
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