贫血的治疗原则首先是（）.
A.去除或纠正病因
B.使用抗贫血药物
C.刺激骨髓造血
D.使用肾上腺皮质激素
E.补充造血原料
参考答案：A
解析：贫血的治疗原则：①治疗引起贫血的原发病，是贫血的根本性治疗；②针对发病机制进行治疗，包括补充造血因子、造血干细胞移植、免疫抑制剂和手术治疗等；③支持疗法，输血是缓解贫血的有效方法，适用于急性失血所致贫血和慢性贫血。
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| The Great Wall of China is 1 to people all over the world. It 2 "The Ten-Thousand-Li Great Wall" in Chinese. Do you know the famous Chinese saying, "He who does not reach the Great Wall is not a 3 man." The Great Wall is 4 wall in the world. It is more than 6,000 kilometers long, and 5 four and five metres 6 . In most places it is wide enough for five 7 or ten men 8 side by side (并排) along the top. It was very 9 to build such a great wall 10 our modern machines. All the work had to 11 by hand. Many people 12 to work on the wall far away from their homes. Thousands of men 13 and were buried (埋葬) 14 the wall. The Great Wall was made not only 15 stone and earth, but also of the flesh and blood (血肉) of millions of men.
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