By default, databases only track when a document was last modified, but by selecting the Maintain LastAccessed property option, the database can also track when a document was last read.

• 默认情况下,数据库只跟踪最近修改文档的日期,但是通过选择Maintain LastAccessed property选项,数据库也可以跟踪最近读取文档的时间。