code: function checkSecondPolicy(api, prev, current) {
  
    // 1秒调用超过2次则出错
    if (prev.policy2.counter > 2) {
      return true;
    }
  
    if (current - prev.policy2.last > 1000) {
      prev.policy2.counter = 1;
      prev.policy2.last = current;
    } else {
      prev.policy2.counter++;
    }
  
    return false;
  }
docs: 每秒调用限制策略
  @param api
  @param prev
  @param current
  @returns {boolean}