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Greek Prime Minister Alexis Tsipras (R, front) gives presents to Greek students during an event to celebrate Christmas at Prime Minister's office in Athens, Greece, on Dec. 23, 2017. (Xinhua/Marios Lolos)
Greek Prime Minister Alexis Tsipras (R, front) gives presents to Greek students during an event to celebrate Christmas at Prime Minister's office in Athens, Greece, on Dec. 23, 2017. (Xinhua/Marios Lolos)