为什么俄乌战争美国坚持不下场，为什么在中东美国坚持不打伊朗，美国国防部官网给出答案：

https://www.defense.gov/News/News-Stories/Article/Article/3607785/official-says-2023-was-most-transformative-for-dod-in-indo-pacific/

“Even with Russia's invasion of Ukraine, the Hamas attack on Israel, terror attacks in the Red Sea and more, DOD has concentrated on the "pacing challenge" for the United States – China, he told the Defense Writers Group. ”  

“On the defense side, Secretary of Defense Lloyd J. Austin III has concentrated on China, because it "has been identified as the only country in the world with both the will and, increasingly, the capability to reshape the international order," Ratner said. "That was the assessment at the time of the release of the National Defense Strategy, and that remains the assessment today."