美国MPEP-rejection of claims

上下文

Rejection of claims.
(1) If the invention is not considered patentable, or not considered patentable as claimed, the claims, or those considered unpatentable will be rejected.
(2) In rejecting claims for want of novelty or for obviousness, the examiner must cite the best references at his or her command. When a reference is complex or shows or describes inventions other than that claimed by the applicant, the particular part relied on must be designated as nearly as practicable. The pertinence of each reference, if not apparent, must be clearly explained and each rejected claim specified.
(3) In rejecting claims the examiner may rely upon admissions by the applicant, or the patent owner in a reexamination proceeding, as to any matter affecting patentability and, insofar as rejections in applications are concerned, may also rely upon facts within his or her knowledge pursuant to paragraph (d)(2) of this section.

在cite prior art 的时候，如果prior art又臭又长，或者不同领域，需要在rejection时，尽量缩小prior art引用范围。

楼主是怎么理解的啊？

引用的对比文件X的第几页第几行的什么内容，引用是为了说明什么，证明这个说法

前后文理解了，不知道中间的这句话要表达什么

楼主是在答Office Action遇到这句话的吗？OA原文怎么写的？