The first UN aid deliveries arrived on Thursday in Syrian rebel-held zones, but chances of finding survivors have dimmed since the passing of the three-day mark that experts consider a critical period to save lives.Bitter cold hampered search efforts in both countries, but more than 80 hours after the disaster struck, 16-year-old Melda Adtas was found alive in the southern Turkish city of Antakya.Her overjoyed father was in tears and the grieving nation cheered an agonisingly rare piece of good news.“My dear, my dear!” he called out as rescuers pulled the teen out of the rubble and the watching crowd broke into applause.The 7.8-magnitude quake struck early Monday as people slept, in a region where many had already suffered loss and displacement due to Syria’s civil war.Top aid officials were planning to visit affected areas with World Health Organization head Tedros Adhanom Ghebreyesus and UN humanitarian chief Martin Griffiths both announcing trips.The president of the International Committee of the Red Cross, Mirjana Spoljaric, said she had arrived in Aleppo.“Communities struggling after years of fierce fighting are now crippled by the earthquake,” Spoljaric tweeted on Wednesday.“As this tragic event unfolds, people’s desperate plight must be addressed.”