After being hit by a car, mainly look at the specific location of the trauma and just do the appropriate examination, such as creating to the abdomen, focus on doing CT of the whole abdomen, pay attention to whether there is any damage to the spleen and pancreas, because this is the more vulnerable organ in the abdominal cavity. Check the bone, such as creating a leg or bump, have a fall, pay attention to the leg bone, hand bone, rib bone and a series of long bones have no damage. The joints have no misalignment, if the head landing, accompanied by obvious trauma can check the head CT. mainly to see the symptoms, the whole body examination is to prevent rupture of important organs, for the cranial injury to screen, because large internal bleeding can easily lead to fatal, if the fracture is not corrected in time, it is easy to leave sequelae.