答句just fine 的问句是什么

答句just fine 的问句是什么
不要回答了，问句是：How's everybody doing?

求分析解释just fine 句中成分和意思
I know when it all went wrong for me.I had started doing my Ph.D.in 1998.My supervisor employed two long-term postdocs,who had worked with her for many years,and their uninterrupted work in her lab ended only when she retired.The other labs at the University of Edinburgh's Institute of Cell and Molecular Biology,often had long-term postdocs as well.I decided that being a long-term postdoc would suit me just fine.