方法对摘除的正常下颌下腺进行墨汁、福尔马林灌注固定并切片，光镜下观察腺体的血管构筑的形态特点和分布规律。
Methods The normal human submandibular gland was perfused by formalin and prepared chinese ink, its microvasculature was observed under the light microscope.
然后取病变部分，用1 0 %的福尔马林溶液固定后切片，HE染色，光镜下观察；
Then take the lesion part, fix it with 10% formalin and make into slices with HE staining, and observe it under optical microscope.
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