近年来，图书情报界思想活跃，事业繁荣，涌现出大批高水准的理论文章。它们犹如一簇绚丽的鲜花，为图书情报事业的花圃增添了夺目的色彩。如果说艺术可以分品论级，那么这些论文也可类分三品。打个比喻，不妨把这三品分别称为“空蚌”、“活蚌”、“珍珠蚌”。在蕴珠藏玉的河 In recent years, the Library and Information Service has an active thinking and a prosperous career, and a large number of high-level theoretical articles have emerged. They are like a cluster of beautiful flowers, adding a dazzling color to the garden of the Library and Information Service. If art can be sub-product level, then these papers can also be divided into three categories. Make a metaphor, may wish to refer to these three products as “empty clam”, “living clam”, “pearl mussel.” In Yun Zhu Tibetan jade river