pca测试是什么

简介：The little nurse helped Uncle Pan, who was pale and still holding his buttocks with his right hand, to come out. He helped him to the hospital bed, covered him with a quilt, and then gave him a needle and infusion. There were many bottles and cans of saline, and it took a long time to inject the saline solution, which made Uncle Pan's mouth water. He was knocked crooked by the female doctor, and his whole body was trembling, like a bullied little white rabbit trembling.