docs: @Override
  	public boolean offer(E e) {
  		if(size() >= capacity) {
  			E head = peek();
  			if (this.comparator().compare(e, head) <= 0){
  				return true;
  			}
  			//当队列满时，就要淘汰顶端队列
  			poll();
  		}
  		return super.offer(e);
  	}