Children who are not diagnosed soon enough as having a learning disability and, consequently, are not treated the appropriate way, often constitute a large proportion of the student population that is led to school failure or drop-out.
563. 在学校中学习不极格或辍学的学生中，往往主要是一些不能及早诊断出有学习障碍并因之对他们作出适当安排的儿童。