According to a survey, students' safety has become a big problem.
根据一项调查，学生的安全已经成为一个重大问题。
2
According to a Visa survey conducted in March, travelers are still concerned about health and safety, as well as the state of the infrastructure in the affected areas.
威士公司3月份的一项调查显示，旅游者仍然对该受灾地区的卫生、安全和基础设施状况表示担忧。
3
A survey by Ms Levenson found that 86% of family members felt stressed because of registration and residence rules, and 49% feared for their own safety.