@classmethod
def filter_key(cls, json_result_file, max_num, *key_file_list):
    """
        过滤出包含当前query的结果行
        """
    keys = list()
    assert len(key_file_list) >= 1
    for words in cls.get_combination_word(*key_file_list):
        keys.append(' '.join(words))
    max_num = int(max_num)
    with open(json_result_file) as json_result_f:
        for line in json_result_f:
            line = line.strip()
            key, url, index = line.split('\t')
            index = int(index)
            if index <= max_num and key in keys:
                print(line)
