Shim Suk-hee of South Korea won the silver medal and Italy's
Arianna Fontana took the bronze after a hotly-contested race at
the Iceberg Skating Palace.
Dutch skater Jorien ter Mors finished fourth while China's Li
Jianrou, South Korea's Kim Alang and American Emily Scott all
fell midway through the race, effectively ending their chances
of making the podium.
The 22-year-old Zhou timed her race to perfection, taking the
lead approaching the final lap and sprinting clear to collect
her third Olympic gold medal after she won two in Vancouver four
(Reporting by Julian Linden; editing by Peter Rutherford)
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