Final answer:
An employee at the scene of an accident on a crowded train station should prioritize helping those who might be injured and provide first aid or notify an authority figure if necessary.
Step-by-step explanation:
An employee who happens to be at the scene of an accident on a crowded train station should prioritize helping those who might be injured in the accident. They should stop and provide first aid or notify an authority figure if they are unable to provide assistance themselves. It is important to ensure the person in need gets help, especially in situations where the bystander effect may hinder others from taking action.