for reference fields, only the number of the chapter heading containing the referenced object is displayed in the field. If the paragraph style for the chapter heading is not numbered, the field is left blank.
。这样，在引用中即显示引用对象的章节编号。如果目前该级的章节还未编号，$[officename] Writer 将在上一级中查找带编号的级并插入其章节编号。