我在火车上看见两个小偷正在扒窃一老人的钱包,于是马上提醒老人,却遭来两名小偷的殴打,当乘警赶来时,两名小偷早已逃走。因被小偷殴打,我住院治疗六天,用去医疗费九百余元。因小偷至今尚未抓获,不知道我的医疗费应由谁承担? When I saw two thieves picking up an old man’s wallet in a train, I immediately reminded the elderly that they were beaten by two thieves. When the police arrived, the two thieves had already escaped. He was hospitalized for six days because of being beaten by a thief. He spent nine hundred dollars on medical expenses. Because the thief has not yet been captured, I do not know who should be responsible for medical expenses?