According to Everett Worthington, "depression is a downward spiral begun by loss of control and made worse by lack of energy and negative thinking".

Everett Worthington说：“抑郁就像一个向下旋转的漩涡，因为人们失去了控制，并且会由于缺乏精力和负面思维而变得更糟。”

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After the ceremony, Everett L. Worthington Jr.

NPR: Obama Sets Humble, Open Tone For White House