Rodrigo 手头并没有许多独特的照片。设计广告素材时，他应该考虑怎样做？请选择所有合适选项。

When Rodrigo lacks unique photos, leveraging stock images effectively is key. Adding text or keywords to open spaces on stock photos allows him to convey specific messages or branding without needing custom photography. Personalizing stock images, such as by applying brand colors, filters, or overlays, makes them feel more integrated with his brand identity and less generic. Limiting content frequency or repeatedly posting the same content are poor strategies; they reduce audience engagement and can lead to ad fatigue. Instead, the focus should be on creatively adapting available resources.