It's expiration day. You are short a massive amount of call options, and the stock is hovering right around your strike price. Walk me through your delta hedging dynamics as we approach the market close. What are the practical risks here?

今天是期权到期日，你空头持有大量即将到期的看涨期权，且股价刚好在行权价附近徘徊。随着收盘临近，你的Delta对冲操作会有什么实际风险？