89. 急性胃炎造成的糜爛(erosion) 係指病理變化通常不超過胃部的那一層(A)表面淺層上皮(Superficial epithelium)(B)黏膜肌層(Muscularis mucosae)(C)黏膜下層(Submucosae)(D)肌肉層(Muscle layer)