1. It's better for schoolgirls to wear trousers and blouses when they're at school.
2. Wearing trousers and blouses is convenient when students ride a bicycle to school.
3. They don't have to worry about keeping their trousers straight in place when there are strong winds.
4. Schoolgirls feel more comfortable when doing the cleaning the classrooms or playing schoolyard.
5. The long trousers can help schoolgirls hide the defect in their body.