Objective: To observe the effect of preoperative intestinal preparation disusing oral antibiotic in colorectal cancer.
目的：观察大肠癌术前未口服抗生素行肠道准备的效果。
2
When we talk about recycle and reuse of oil extraction wastewater, we mean to make the original disusing or discharging wastewater become useful water resource after treated by some process.