[名词解释] 痂(crust)

结膜炎患者结膜囊内滴入0.1%的肾上腺素时() ["A．结膜充血消失","B．结膜充血无改变","C．结膜充血加重","D．结膜水肿减轻","E．结膜水肿消失"] 萎缩(atrophy) 结膜炎最基本的体征是（） ["A．结膜充血","B．结膜水肿","C．结膜脓性分泌物","D．滤泡形成","E．乳头增生"] 结膜最常见的疾病是() ["A．结膜皮样脂肪瘤","B．翼状胬肉","C．睑裂斑","D．结膜炎","E．结膜血管瘤"] 瘢痕(scar) 痂(crust)