慢性泪囊炎
鼻泪管狭窄或阻塞后,泪液滞留于泪囊内,导致泪囊继发的慢性感染性炎症性疾病,称为慢性泪囊炎。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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