患者，男，46岁，左上后牙牙龈突然肿胀两天。两周前曾在牙周科刚结束龈下刮治治疗，急诊诊断为急性牙周脓肿，脓肿形成最可能的原因是（）
A.牙髓炎症
B.食物嵌塞
C.口腔卫生保持不良
D.牙周袋深处牙石未刮净
E.
创伤
参考答案：D
解析：本题考查考生对牙周脓肿发病因素的掌握，五个选项中仅D选项符合。且题干中提示患者两周前曾在牙周科刚结束龈下刮治治疗，可帮助选择。
Last Christmas while staying with my parents, I 36 across some old love letters that my parents wrote to each other. these letters were all piled up in a basket, dirty and 37 with dust. 38 to read and sort them, I asked them if I could take the letters back to my Illinois home. They agreed. As I carefully opened each letter, all of them 39 with age, I discovered a new page 40 unknown to me in this private chapter of my parents’ lives. My father used to 41 in the army. So his letters were full of frontline(前线) 42 of the things about the war. Each of my mother’s letters was marked with her 1944 dark red lipstick(口红) kiss. I was 43 to these letters like a magnet(磁铁). Just six weeks after our Christmas visit, Daddy became very 44 and was hospitalized(住院). This time, he was fighting a 45 kind of war. As I sat by his bedside, we discussed the 46 . He told me how much receiving those lipstick-kissed letters had 47 to him when he had been so far from home. It so happened that the next day would be February 14. From the 48 letters I chose the card my father had sent mother in 1944 and brought it to my father’s bedside. At his bedside, I joked with him, saying 49 .“Today is Valentine’s Day, don’t you want to sent Mother a present?” He became more 50 when I handed him the old 51 . He carefully opened it and took out the card, and when he 52 it, his eyes were filled with tears. My father, in a voice tight with 53 read the loving 54 he’d sent to my mother fifty-six years earlier. And this time, he could read it to her 55 .
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