worries about the future consequences; often in negative expressions, meaning "no worries about anything"; fears of trouble in the rear (idiom); family worries (obstructing freedom of action)
来自后方或事后的忧患。
偏正式；作宾语；指后方的忧患
顾：回头看。来自后方的忧患。指在前进过程中，担心后方发生问题。
《魏书·李冲传》：“朕以仁明忠雅，委以台司之寄，使我出境无后顾之忧。”
将军为殿，寡人后顾之忧矣。 ◎明·冯梦龙《东周列国志》第六十二回