Is the word "spare no effort" equivalent to "spare no effort"? What is the difference?

Yu and Yu are the same. When the meaning of "Yu" may be confused, use "Yu".

"Jumping into old age, the rhythm is sunny"-a thousand words

"Qi Qian Dian has been away from the palace for a hundred years"-the whole Tang poetry (Volume I)

"It takes more time to remove the residual core and burn more incense."-Li Qingzhao's Complaints.

Not many years.

Don't trade [hexagrams] for anything else: the yellow calendar has days of "easy" and "taboo". Don't do anything except what the yellow calendar allows (such as seeking medical treatment, treating diseases, destroying houses, etc.). It can be translated into modern Chinese: "There is nothing else to do and nothing else to do".