On the afternoon of August 10, around 2 PM, at the intersection of Fuxi West Road and Section 3 of Xisan Road of Chengdu's 1st Ring Road, a young girl was beaten unconscious by a man riding an electric bike. After receiving the emergency call, the ambulance from the Traditional Chinese Medicine Hospital immediately rushed to the scene for emergency rescue. The girl was declared brain dead when she arrived at the hospital. Yesterday afternoon at around 2:50 PM, the doctor announced that the girl's respiration and heartbeat had stopped. The girl passed away. Why was the girl beaten so severely?