组别	例数	术前	术后1天	术后3天	术后5天	术后7天
观察组	50	39.50 ± 2.33^b^cde	34.41 ± 2.18^cde	33.90 ± 2.24^Cde	36.94 ± 2.17^E	39.50 ± 2.33^b^cde
对照组	50	38.96 ± 3.24^B^CDE	33.78 ± 3.17^CDE	32.41 ± 3.03^DE	33.91 ± 2.90	38.96 ± 3.24^B^CDE