Lareau and her team visited each family at least twenty times, for hours at a stetch.

拉里奥和她的同事对每个家庭进行了不少于20次的考察，每次考察的时间都持续好几个小时。

Conclusion Truck muscle strength training and stetch therapy were effective in treating the chronic low back pain and preventing from reoccurrence.

结论躯干肌肌力训练与牵伸对慢性腰痛患者的疗效明显并肥有效的防治其复发。