【病例】　男,37y。因咳嗽半月而入院。经胸片诊断为右下肺炎。查体全身皮肤无淤点、淤斑及皮下出血。血小板150×109/L。给氟罗沙星(山东天福制药厂,批号990308)0.4g加入5%GS250ml中ivgtt(经右手背静脉),用药200ml时发现患者右前臂的屈侧距进针点约18cm处出现两片皮下出血斑,? [Case] ​​Male, 37y. Cough for a month and admitted to hospital. Trans-chest diagnosis of lower right pneumonia. Physical examination of the skin without cramps, ecchymosis and subcutaneous hemorrhage. Platelets 150 × 109 / L. To fleroxacin (Shandong Tianfu Pharmaceutical Factory, lot number 990308) 0.4g added 5% GS250ml ivgtt (right hand dorsal vein), medication 200ml found in the right forearm flexion of the patient from the needle point about 18cm at the two subcutaneous bleeding spots ,?