According to journal of adolescent health’s study, ______.

参考解析：

细节理解题。根据最后一段第二句“According to the journal of adolescent health, 25 percent of male students and 13 percent of female students are addicted to the Internet.”可知,上网的学生中，25%的男学生和13%的女学生有网瘾。A项描述不准确，并不是大多数男生不合理上网；根据最后一段最后一句“Of those addicted to the internet, 32 percent were engaged in aggressive behavior online and these students may have threatened physical violence on someone else at some point.”B选项错误，并不是更多女生有网络过激行为；C选项根据报道，有网瘾的学生都是经常上网的，所以经常上网并不安全，C选项错误；有网瘾的学生中男性比例高于女性，D选项正确。故选D。