In this sentence, the correct word to fill in the blank is "detail." So the sentence should read: "My father helped me to review my work. He always says that we need to pay attention to every detail." Explanation: "Detail" fits the context because it refers to the small parts or aspects of something that require careful attention. "Situation" does not fit here, as it refers to a set of circumstances or a specific state of affairs, which does not match the context of reviewing work.

Detail

¡Detalle, sin duda!