For example, when the player opens a secret entrance, I want to print an object "secret entry" in a message, so that the player knows that there is a new thing and easily click that item in the message.
And sometimes I want to let players make a decision, how to print a choice problem in the message so that player could click to make choice?
For example, after players do something, there will be a message like:

1. do it
2. not do it
   and the player can click 1 or 2 to make a decision.
   Thanks!

And sometimes I want to let players make a decision, how to print a choice problem in the message so that player could click to make choice?

Don't know about the first - hyperlinks maybe? - but for this you want to use the Menu block of code.

I've updated my question. There is an example.

You misunderstood. The example you provided is EXACTLY what Menu does. What I don't know is:

 I want to print an object "secret entry" in a message, so that the player knows that there is a new thing and easily click that item in the message.

and it's what I suggested hyperlinks for, but I've never done anything like that.

You had a two part question. I didn't know how to do part 1. I did know how to do part 2.

For example, when the player opens a secret entrance, I want to print an object "secret entry" in a message, so that the player knows that there is a new thing and easily click that item in the message.

You can use the text processor:
msg ("You have found a {object:secret entry} in the corner of the room!")

or core functions:
msg ("You have found " + GetDisplayName(secret entry) + " in the corner of the room!")

(GetDisplayName will make the link and also add "a" or "an" as appropriate for the object name)

And sometimes I want to let players make a decision

Ask ("Do you want to do it?") {
  if (result) {
    // code to run if they choose "Yes" goes here
  }
  else {
    // code to run if they choose "No" goes here
  }
  // code to run after the results of the player's choice whether they choose yes or no should go here
}
// code here will be run after the question is DISPLAYED, but before an answer is chosen
// a common mistake is to put code here that depends on the answer even though the player hasn't chosen it yet

You could also do:

ShowMenu ("Do you want to do it?", Split("do it;don't do it"), false) {
  split (result) {
    case ("do it") {
      // code to run if they choose "do it" goes here
    }
    case ("don't do it") {
      // code to run if they choose "don't do it" goes here
    }
    default {
      // this code will only run if you mistyped one of the options
      // it's a good idea to show a message, so it's easier to fix if you made a mistake
      error ("Unexpected menu response: "+result)
    }
  }
  // code to run after the results of the player's choice whether they choose yes or no should go here
}
// code here will be run after the question is DISPLAYED, but before an answer is chosen
// a common mistake is to put code here that depends on the answer even though the player hasn't chosen it yet

Thank you! exactly what I want!!