Definition of systematic evaluation in evidence-based medicine: To systematically and comprehensively collect all relevant published or unpublished clinical research articles from all over the world for a specific clinical problem (etiology, prognosis, diagnosis, and efficacy of interventions), and to screen out qualified studies with uniform and scientific evaluation criteria, conduct quality evaluation, quantitative synthesis by statistical methods, or qualitative synthesis by descriptive methods, and draw reliable conclusions. The quality of the studies is evaluated and synthesized quantitatively using statistical methods or qualitatively using descriptive methods to draw reliable conclusions, which are updated in a timely manner as new clinical research results emerge. Systematic evaluation as research is published as a thesis.