You're a trader looking to buy a liquid stock. Walk me through the key differences between a Market Order and a Limit Order, and discuss the circumstances under which you would choose to use each.

假设你是一名交易员，现在想买入一支流动性较好的股票。请你解释一下市价订单（Market Order）和限价订单（Limit Order）的主要区别，并说明在什么情况下你会优先选择使用其中一种订单类型。