Experimental group:mFOLFOX/mFOLFIRI (sodium levofolate and 5-FU simultaneously and continuously infused intravenously) plus targeted agents

A single-arm, single-center clinical study to evaluate the efficacy and safety of mFOLFOX/mFOLFIRI (sodium levofolate and 5-FU simultaneously and continuously infused intravenously) plus targeted agents in the first-line treatment of patients with advanced colorectal cancer

Clinical Study on the Efficacy and Safety of a 5-Fluorouracil/Levofolinic Acid-Containing Regimen in Patients with Advanced Colorectal Cancer Who Have Failed First-Line Therapy