'å·æ° Question object çå±æ§.
äŸåŠåç­æ°å¢å äº, åè°çš ``refresh()``
åè®¿é® answer_num å±æ§, å¯è·åŸæŽæ°åçç­æ¡æ°é.
:return: None'

def refresh(self):

    super().refresh()
    self._html = None
    self._title = None
    self._details = None
    self._answer_num = None
    self._follower_num = None
    self._topics = None
    self._last_edit_time = None
    self._logs = None
