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There are four basic types of blood: A, B, AB, and O. A simple test can show a person’s blood type. Everybody is born with one of these four types of blood. Blood type, like hair color and height, is inherited from parents.
血型有四种基本类型：A型、B型、AB型和O型。通过一个简单的检测就可以知道一个人的血型。每个人天生就有这四种血型中的一种。血型，如头发的颜色和高度，是从父母那里继承而来的。
Because of substances contained in each type, the four groups must be transfused carefully. Basically, A and B cannot receive AB, but AB may receive A or B. O can be given to any other group; hence, it is often called the universal donor. For the opposite reason, AB is sometimes called the universal recipient.
由于每种血型内的物质差异，输血时必须要非常小心。基本上来说，有A型或B型血液的人不能输入AB型血液，但AB型的可以接收A型或B型的。 O型血可以输出给其他任一一种，因此它通常被称为“万能供血者”。反过来，AB型血有时也被称为“万能受血者”。
However, because so many reactions can happen in transfusions, patients usually receive only salt or liquid until their blood can be matched as exactly as possible in the blood bank of a hospital. In this way, it is possible to avoid any bad reactions to the transfusion.
不过，由于输血可能发生很多反应，患者通常只能先输入盐水或其他液体，直到在医院的血库中找到与他们尽可能准确匹配的血液。通过这种方式，可以避免输血的任何不良反应。
There is a relationship between your blood type and your nationality. Among Europeans and people of European ancestry, about 42 percent have type A while 45 percent have type O. The rarest is type AB. Other races have different percentages. For example, some American Indian groups have nearly 100 percent type O.
人的血型与其国籍之间也存在联系。在欧洲人和欧洲裔后代中，约有42％的人属于A型血，45％的人属于O型血，最少见的是AB型血。其他种族有不同的百分比，例如，在一些美洲印第安人族群里可能100％的人都属于O型血。 |
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发表于 2019-6-28 01:11:13
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发表于 2019-6-28 15:11:59
