The car in front of me suddenly crashed into a tree on the side of the road and sent up thick smoke. I stopped my car and tried to save the people in the car. But I was afraid that the car would suddenly explode or catch fire. After some hesitation, I called the police and asked for an ambulance. At that time, the driver got out of her car. I asked her  whether she was hurt. She said she wasn't hurt and thanked me. I made sure she was Ok and left.

The car ahead suddenly crashed into the tree by the roadside,the sick smoke came out of the car at the moment.I stopped the car and wanted to rescue the people from the car,but I am afraid that the car would suddenly explode or catch fire and hurt me.I was struggling for a while and I didn't go over.I called the police and the ambulance.The owner of the car came out when I was calling,I went up and asked if she was hurt.She said 'thanks' to me,and then I left.

抱歉，我认为您在原文中“我上前询问，她没有受伤”是想表达“我上前询问她有没有受伤”，如果不是这个意思，那原文翻译为“I went up and asked,she wasn't hurt"