a nurse casually chats with a smiling senior patient while drawing blood from his vein for blood tests and analysis - 驗血 個照片及圖片檔捐血, 病人, 醫學研究
neurology research,patients blood sample being checked against the medical scan during a clinical trial - 驗血 個照片及圖片檔老人痴呆症, 實驗室
hand in medical gloves holding test tube with blood sample for laboratory analysis - 驗血 幅插畫檔、美工圖案、卡通及圖標捐血, 實驗室, 插圖
high angle view of doctor piercing needle in patient's arm for medical exam in clinic - 驗血 個照片及圖片檔體檢, 成年人
female doctor applying medicine to asthmatic patient sitting by mother in hospital - 驗血 個照片及圖片檔兒童, 醫生, 男孩