You need to buy 10,000 shares. The Best Bid is $100.00. The Best Ask is $100.05 with 2,000 shares. The next Ask level is $100.10 with 10,000 shares. If you route a market order, calculate your exact slippage. How would you optimize this?

你需要买入 10,000 股某股票。当前 Best Bid 是 $100.00。Best Ask 是 $100.05，挂了 2,000 股。下一档 Ask 是 $100.10，挂了 10,000 股。如果你直接下市价买单，你的滑点（slippage）是多少？怎么优化？