One more reason not to lose sleep over the rise in oil prices is that,unlike the rises in the 1970s,it has not occurred against the background of general commodity price inflation and global excess demand.
问题：这句中not to lose sleep over the rise in oil prices 做什么成分，应该如何翻译？
not to lose sleep （不要失去睡眠）
over the rise in oil prices （在石油价格上涨这个问题上）
这样断句你就看得懂了