Clinical Study of Fruquintinib Combined With Raltitrexed in the Treatment of Metastatic Colorectal Cancer

Fruquintinib capsule is taken orally once a day, 5 mg each time, and taken for 2 weeks and stopped for 1 week, every 21 days (3 weeks) for a cycle. Raltitrexed: 3 mg/m2 intravenously, on the first day of each cycle, for a treatment cycle of 3 weeks. Combination treatment until toxicity becomes intolerable, disease progression, or death.