患者，男性，13岁，20分钟前不慎摔倒，致右上中切牙脱落就诊，检查见右上中切牙牙体完整、相邻牙无明显松动。正确的处理方法是（）
A.将创口缝合，择期行缺牙修复治疗
B.立即将脱位牙清洁，浸泡于抗生素溶液30分钟，后再植并固定
C.先将脱位牙根管治疗，然后再植并固定
D.立即将脱位牙浸泡于牛奶中30分钟，后再植并固定
E.立即将脱位牙清洁，去除牙周膜组织，后再植并固定
参考答案：B
解析：外伤脱位的牙，应用无菌生理盐水清洗干净后，置于广谱抗生素溶液中浸泡15～30分钟。进行牙处理时，小心保护牙周膜。对根尖发育未完成的牙，不做牙髓处理。故正确答案是B。
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| There are many kinds of friends. Some are always 1 you, but don't understand you. Some say only a few words to you, but understand you. Many people will step in your life, but only 2 friends leave footprints (脚印). I shall always recall (回忆) the autumn and the girl with the 3 . She will always bring back the friendship between us. I know she will always be my best friend. It was the golden season. I could see the yellow leaves 4 in the cool 5 . In such a season, I liked walking alone in the leaves, 6 to the sound of them. Autumn is a 7 season but life is uninteresting. The free days always get me 8 . But one day, the sound of a violin 9 into my ears like a stream (小溪) flowing in the mountains. I was so surprised that I jumped to see what it was. A young girl, standing in the wind, was 10 in playing her violin. I had 11 seen her before. The music was so nice that I listened quietly. Lost in the music, I didn't know that I had been 12 there for so long but my existence (存在) did not seem to disturb her. Leaves were still falling. Every day she played the violin in the corner of the building 13 I went downstairs to watch her performance. I was the only listener. The autumn seemed no longer lonely and life became 14 . 15 we didn't know each other, I thought we were already good friends. I believed she also loved me. Autumn was nearly over. One day, when I was listening carefully, the sound suddenly 16 . To my astonishment (惊讶), the girl came over to me. "You must like the violin," she said. "Yes. And you play very well. Why did you stop?" I asked. Suddenly, a 17 expression appeared on her face and I could feel something unusual. "I came here to see my grandmother, but now I must leave. I once played very badly. It was your listening every day that 18 me." she said. "In fact, it was your playing 19 gave me a meaningful autumn," I answered, "Let's be friends." The girl smiled, and so did I. I never heard her play again in my life. I no longer went downstairs to listen like before. Only thick leaves were left behind. But I will always remember the fine figure (身影) of the girl. She was like a 20 so short, so bright, like a shooting star giving off so much light that it made the autumn beautiful. | ||||
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