The United States and China sparred at the UN over the handling of the Ukraine crisis – Copyright AFP Dave Chan The US envoy to the United Nations called on Beijing Thursday to encourage Russia “to do the right thing” in the Ukraine crisis — drawing a sharp response from her Chinese counterpart who accused Washington of fanning tensions. “We would hope that the Chinese would play a role in encouraging the Russians to do the right thing,” US Ambassador to the UN Linda Thomas-Greenfield in an interview on CNN. Fears are high in Western capitals that Russia is preparing…