A new medical information-sharing network is designed to improve the quality and efficiency of health care in Vermont by making it easier for doctors to learn about their patients. But privacy advocates and some of the doctors that are supposed to use the technology are concerned that the system is too open to abuse. The Vermont Senate will consider a $1.4 billion spending plan today for the next fiscal year. A plan to begin construction of a new bus station in downtown Burlington is on track to begin within the next year.