When you need to describe a thorough examination of something, the phrase "poured over" can be helpful. However, there are a number of synonyms that can be used to convey a similar meaning. "Studied," "analyzed," "scrutinized," and "inspected" are all good options for indicating a careful review or investigation. If you want to emphasize the idea of pouring over something with great intensity or focus, you might try phrases like "devoured," "consumed," or "delved into." Regardless of the word or phrase you choose, be sure to use it consistently throughout your writing to communicate your meaning effectively.