How would you describe someone who is very careful and attentive to details?

The term "meticulous" perfectly describes someone who is very careful and attentive to details. This word conveys a sense of diligence and precision in one’s work or actions, indicating that the individual pays close attention to every aspect, ensuring that nothing is overlooked. A meticulous person often takes the time to double-check their work and strives for high standards, reflecting their commitment to quality and thoroughness.

In contrast, the other options convey characteristics that align more with a lack of care or attention. Terms like "careless," "indifferent," and "reckless" suggest a disregard for detail and an absence of caution, which are the opposite of being meticulous. Thus, "meticulous" stands out as the most fitting description for someone who is diligent and detail-oriented.