A Study of TH-SC01 in the Treatment of Radiation-induced Rectal Injury

"5+7 principle:~1\. In medium and high dose groups, 5 subjects were included in each dose group in the first step, and the first 3 subjects had good safety The investigator evaluated safety and efficacy data and could enroll a fourth and fifth subject.~1. If the number of successful participants in these 5 subjects is less than 2, the study in this dose group will be ended due to drug ineffectiveness, and the researcher will evaluate the safety and enter the next dose group.~2. If the number of successful participants in these 5 cases is greater than or equal to 2, then proceed to the second step.~2\. 7 subjects were included in the second step."