"Hagrid," said Harry loudly, "give it two weeks and Norbert's going to be as long as your house. . .”
The following week dragged by. Wednesday night found Hermione and Harry sitting alone in the common room, long after everyone else had gone to bed. The clock on the wall had just chimed midnight when the portrait hole burst open. Ron appeared out of nowhere as he pulled off Harry's invisibility cloak. He had been down at Hagrid's hut, helping him feed Norbert, who was now eating dead rats by the crate.
"It bit me!" he said, showing them his hand, which was wrapped in a bloody handkerchief. "I'm not going to be able to hold a quill for a week. I tell you, that dragon's the most horrible animal I've ever met, but the way Hagrid goes on about it, you'd think it was a fluffy little bunny rabbit. When it bit me he told me off for frightening it. And when I left, he was singing it a lullaby." (Harry Potter and the Sorcerer's Stone)
What does ‘by’ mean?
(A) in measuring units of: Apples are sold by the bushel. (Dictionary.com)
(B) near to or next to: a home by a lake. (Dictionary.com)