孩子运动后突然鼻出血，家长应让他坐下并捏住鼻翼止血。
If a child suddenly gets a nosebleed after exercising, a parent should have the child sit down and pinch the nostrils to stop the bleeding.
If a child suddenly gets a nosebleed after exercising, a parent should have the child sit down and pinch the nostrils to stop the bleeding.