Two people were killed and two injured in avalanches across the central Sierra.Search teams at Donner Ski Ranch in eastern Nevada County have recovered a man's body after a Monday morning avalanche, sheriff's officials said.Truckee resident Steven Mark Anderson, 49, was identified as the man who was found Monday afternoon at Donner Ski Ranch.Nevada County Sheriff's Department shortly received a report that the man was overdue around noon Monday, and he feared the man may have been caught up in an avalanche that occurred at the ski resort sometime around 9:30 a.m., said Sgt. Bob Jakobs.At approximately 1:30 p.m., a …