Here are the answers to the questions based on the text:

1. **What is the common type of accident for young children at home?**
- Falling.

2. **How to prevent a child from falling out of the windows?**
- Make sure he or she can’t open any windows.

3. **What may happen if a child goes near the stairs?**
- He or she may fall down the stairs.

4. **What should we do when a child is on the bed or a sofa?**
- Make sure he or she can’t roll off the bed.