port of call
noun
1- a place where a ship stops on a voyage靠泊港, 停靠港。
1.1
- any of a number of places that a person visits in succession途中逗留地：
his last port of call that morning was Angela's solicitor
那天早上他的最后一个逗留地为安吉拉的律师家
figurative 〈喻〉 if you're serious about spreadsheeting, then this package must be your first port of call.
如果你很看重电子表格的话, 那么这一揽子提议就应该是你首先要看的东西。