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【单选题】
根据以下文字，回答 147～150 题： 患者，男，30岁，为去除，要求洁治。刷牙出血不明显。临床检查：大量菌斑、牙石，牙龈红肿不明显，探诊后点状出血，附着丧失2～3mm。 第 147 题 临床诊断是（ ）A.
慢性牙周炎
B.
慢性龈缘炎
C.
快速进展性牙周炎
D.
青少年牙周炎
E.
坏死溃疡性龈炎
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