植物提取物的制备:将晾干的车前草(Plantago major)、老鹳草属植物Geranium core-core和玫瑰红花酢浆草(Oxalis rosen)的全草(全株)研磨后,分别以乙醇-水(7:3)回流提取3次,每次1h,提取液过滤后,在旋转蒸发器中干燥,然后冻干。3种提取物的得率分别为15.3%,4.2%和11.9%,提取物溶于0.25%的琼脂溶液中备用。试验动物 Preparation of plant extracts: The whole plant (whole plant) of Planagogo major, Geranium core-core, and Oxalis rosen was ground and dried. Ethanol-water (7:3) was reflux extracted 3 times, each time for 1 h, the extract was filtered, dried in a rotary evaporator, and then lyophilized. The yields of the three extracts were 15.3%, 4.2% and 11.9%, respectively, and the extracts were dissolved in 0.25% agar solution for later use. Experimental animals