SANTA CLARA, Calif. -- The first quarter of the San Francisco 49ers' season is complete. Let's look at some key developments as the defending NFC champion sits at 2-2:Story of the quarter: It's a sad story, while being one of the biggest stories in the league this season. Superstar pass-rusher Aldon Smith is receiving treatment for alcohol abuse. He entered treatment at an undisclosed facility two days before he turned 24 after being arrested for drunk driving.