最佳证据资源数据库的检索顺序为() A: summaries→System→Synopses<br/>of syntheses→syntheses→Synopses ofstudies→studies B: System→summaries→Synopses<br/>of syntheses→Synopses ofstudies→syntheses→studies C: System→summaries→Synopses<br/>of syntheses→studies→Synopses ofstudies→syntheses D: System→summaries→Synopses<br/>of syntheses→syntheses→Synopses ofstudies→studies