角膜上皮细胞来源于()结膜上皮细胞来源于() ["A．角膜缘干细胞","B．结膜杯状细胞","C．睑缘处粘膜杯状细胞","D．结膜穹窿部干细胞和睑缘处粘膜上皮细胞","E．角膜基质层细胞"]
高压灭菌后物品，超过下列多长时间后就不能使用() ["A．3天","B．5天","C．10天","D．7天","E．14天"]
周围血管征应除外() ["A．水冲脉","B．点头运动","C．毛细血管搏动","D．脉搏短绌","E．射枪音"]
试述眼表重建的手术原则。
临床上所指的眼表重建包括哪些内容?
简述结膜和角膜上皮的来源。
