5.下列疾病的組織病理切片表現，何者與咬頰(morsicatio buccarum)最不相似？ (A)尿毒性口炎(uremic stomatitis) (B)口腔毛狀白斑(oral hairy leukoplakia) (C)上皮變異(epithelial dysplasia) (D)白水腫(leukoedema)