(1) The specific time and place of the activity are not clearly stated in the content; The format does not specify the time of initiation after signing.

(2) The second sentence is wrong. "Realize the inculcation of the party and state leaders with our practical actions." It should be changed to "Respond to the inculcation of the party and state leaders with practical actions."

(3) Examples: ① How steel is tempered; Through him, you can find the orientation of life, through him, you can think about the value of life, through him, you can get more meaningful life inspiration. (The answer is not unique)

(4) Knowledge is power, but we need a good reading environment without utility. (That's right)