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我患类风湿性关节炎多年,需要经常到医院化验血。我注意观察到医生每次都在左手无名指上采血,请问这是为什么?难道别的部位不能采血吗?福建金进金进读者:医生验血选择在左手无名指的指腹上采
I suffer from rheumatoid arthritis for many years, need to go to the hospital regularly to test the blood. I noticed that every time the doctor observed on the left hand ring finger blood, what is this? Is it impossible to take blood in other parts of it? Fujian Jin Jinjin reader: doctors blood test choice on the left hand ring finger pulp