GPT and anemia: In patients with anaemia, no significant difference was observed in the postoperative GGT and GGT changes between the ANH group and the control group (p > 0.05); no significant difference was noted in the postoperative ALT and ALT changes between the two groups (p > 0.05); no significant difference was found in the postoperative AST and AST changes between the two groups (p > 0.05), as shown in Supplementary Table S2.