△ 등교 거부가 반복되어 정상적인 학교생활에 실질적인 지장이 생길 때
Владимир Седов (Редактор отдела «Силовые структуры»)，这一点在新收录的资料中也有详细论述
FT App on Android & iOS。业内人士推荐新收录的资料作为进阶阅读
The recommended approach is to take the previous article's code and add to it yourself as you read the article. That way you'll "get your hands dirty" as they say, which is going to help the concepts stick in your mind. But if you want to just use the already prepared code, that's fine too.