笑死，保險完美契合2挟裂，彈福完美契合3属愤，難怪年年被壓價，哪怕很難換籽慢，也要莫須地意思以下（砍一刀）
In Type 1 situations, there are many alternatives and change is relatively easy. Open pursuit of alternatives‐by frequent competitive bidding, if possible—will likely yield the best results. In Type 2 situations, where there are many alternatives but change is difficult—as for providers of employee health-care benefits—it is important to continuously test the market and use the results to secure concessions from existing suppliers. Alternatives provide a credible threat to suppliers, even if the ability to switch is constrained. In Type 3 situations, there are few alternatives, but the ability to switch without difficulty creates a threat that companies can use to negotiate concessions from existing suppliers. In Type 4 situations, where there are few alternatives and change is difficult, partnerships may be unavoidable.
終于不再為難自己浸遗，不給自己攔超出范圍的活，定超出范圍的目標(biāo)箱亿。
