The rapture is strongly implied. I don't see the other way, because of what it says in verse 35...
35 For as a snare shall it come on
all them that dwell on the face of the whole earth.
And by what it says in Revelation 3:
10 Because thou hast kept the word of my patience, I also will keep thee from the hour of temptation,
which shall come upon all the world, to try them that dwell upon the earth.
11 Behold, I come quickly: hold that fast which thou hast, that no man take thy crown.
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It doesn't mandate, nor disqualify, a pre-70th week rapture. The rapture could happen pre-70th week, in the next minute. It means - any time between now, this very second, and when it actually takes place - some time before the Day of the Lord begins when the Antichrist goes into the temple, sits, claims to be God.
And no-one can figure that exact day out (even after the 7 years begin) because there is not enough information given - regarding the transgression of desolation act.
The Day of the Lord comes like a thief in the night because no-one saying peace and safety at that time are going to be expecting the Antichrist's actions.
1Thessalonians 5:2 For yourselves know perfectly that the day of the Lord so cometh as a thief in the night.
And even if the body of Christ has not been raptured before the seven years begin and are still here - and recognize the Antichrist for who he is right off the bat- it still cannot be determined what day the Antichrist goes into the temple, sits, claims to be God.