The phrase "looks through" can be replaced with several synonyms, such as "scans," "peruses," "examines," "inspects," "reads," and "scrutinizes." Each of these synonyms carries its own nuance and connotation, but they all indicate a process of carefully observing or reviewing something. "Scans" suggests a quick and superficial examination, while "scrutinizes" implies a more detailed and critical analysis. "Examines" and "inspects" generally connote a process of checking for errors or flaws. "Peruses" and "reads" suggest a more leisurely and comprehensive approach to reviewing something. Overall, the choice of synonym will depend on the context and the intended meaning.