What is the test for reviewing opposing papers in a de novo review?

opposition papers except that to which objections have been made and sustained." (Guz v. Bechtel National, Inc. (2000) 24 Cal.4th 317, 334.) "In performing our de novo review, we must view the evidence in a light favorable to plaintiff as the losing party [citation], liberally construing her evidentiary submission while strictly scrutinizing defendants' own showing, and resolving any evidentiary doubts or ambiguities in plaintiff's favor." Saelzler v. Advanced Group 400 (2001) 25 Cal.4th 763, 768.)