中学生李某，出于好奇，在地摊上买了一把弹簧刀。一天，他与同学小于一起去学校，途中二人因口角而扭打，身单力薄的李某争不过身高马大的小于，情急之下，抽出弹簧刀向小于扎去。小于顿时血流如注，躺倒在地。李某被依法追究刑事责任，被送入少年犯管教所服刑。根据有关法规 Middle-class student Lee, out of curiosity, bought a spring knife in the stalls. One day, he and his classmates went to school together, on the way two due to the angle of the mouth and the fight, the thin body of Lee competing, but the height of a large horse is less than a matter of urgency, out of the spring knife to less than Zha go. Less than immediately blood flow Note, lying on the ground. Lee was held criminally responsible, was sentenced to juvenile delinquency. According to the relevant laws and regulations