The results showed that the omega-3 fatty acid group had a lower infection rate (omega-3 fatty acid, 19.4% vs control, 43.8%, P < 0.05), a better liver function after hepatectomy: alanine transaminase (omega-3 fatty acid, 48.23±18.48 U/L vs control, 73.34±40.60 U/L, P < 0.01), aspartate transaminase (omega-3 fatty acid, 35.77±14.56 U/L vs control, 50.53±24.62 U/L, P < 0.01), total bilirubin (omega-3 fatty acid, 24.29±7.40 mmol/L vs control, 28. The gene discussed is GPT; the disease is infection.