每到期中、期末考试结束，老师们最头疼的不是阅卷，而是如何安全、高效地把成绩发给家长。成绩涉及学生隐私，一旦处理不当，轻则引发家长不满，重则造成班级管理混乱。尤其是在微信群里直接发成绩单截图，稍有不慎就会让全班学生的姓名、分数一览无余，既违反了教育信息 ...

This flask excels at thermal retention: my flat white was still steaming after a two-hour morning hike and swim in the Lake District, while iced coffee stayed cold for the entire afternoon on a 24C ...