President Barack Obama has conducted a final meeting on his military review for Afghanistan, administration officials said, and he is expected to explain his decision in an address to the nation next Tuesday.

“After completing a rigorous final meeting, President Obama has the information he wants and needs to make his decision and he will announce that decision within days,” Robert Gibbs, the White House press secretary, said Tuesday morning.

For two hours on Monday evening, Mr. Obama held his ninth meeting in the Situation Room with his war council. The session began at 8:13 p.m., aides said, and ended at 10:10 p.m.

The president’s military and national security advisers came back to the president with answers he had requested during previous meetings, most of which focusing on these questions: Where are the off-ramps for the military? And what is the exit strategy?

Mr. Obama did not announce his specific decision to his advisers. He is scheduled to stay at the White House over the Thanksgiving holiday to finish making his decision, as the White House plans to prepare for what could be Mr. Obama’s first prime-time address to the nation from the Oval Office.