翻译原文：

CHICAGO (Reuters) - Americans appear to be doing a better job of managing diabetes, with more than half of diabetics reaching recommended targets for controlling blood sugar last year, according to a survey published on Saturday.

Just over a third of people had their diabetes well-controlled in 2001, according to a study of lab tests done on more than 4 million people with type 1 and type 2 diabetes.

"Control has gotten better and impressively so, but we are not there yet," said Dr. Francine Kaufman, of the University of Southern California and past president of the American Diabetes Association, who analyzed the data.

Overall, diabetes control between 2001 and 2006 improved by 44 percent, according to the study, which was conducted by lab testing company Quest Diagnostics Inc.

Controlling diabetes is important because the condition can quietly damage blood vessels, leading to loss of toes and limbs, blindness, heart disease and death.

 The study found that people with diabetes have a worse time controlling their diabetes in the winter, and that men struggle with it more than women. The results were presented on Saturday at the American Diabetes Association's annual scientific meeting in Chicago.

 About 20.8 million Americans have diabetes, which causes about 5 percent of all deaths globally each year. Most have type 2, or adult onset diabetes, in which the body loses its ability to use insulin properly.