全文获取类型
收费全文 | 3734349篇 |
免费 | 289853篇 |
国内免费 | 8634篇 |
专业分类
耳鼻咽喉 | 56996篇 |
儿科学 | 119708篇 |
妇产科学 | 101507篇 |
基础医学 | 519938篇 |
口腔科学 | 107055篇 |
临床医学 | 345740篇 |
内科学 | 731732篇 |
皮肤病学 | 86214篇 |
神经病学 | 304713篇 |
特种医学 | 145699篇 |
外国民族医学 | 1084篇 |
外科学 | 575611篇 |
综合类 | 84489篇 |
现状与发展 | 76篇 |
一般理论 | 1398篇 |
预防医学 | 286943篇 |
眼科学 | 91200篇 |
药学 | 266757篇 |
11篇 | |
中国医学 | 7536篇 |
肿瘤学 | 198429篇 |
出版年
2018年 | 43106篇 |
2017年 | 34348篇 |
2016年 | 38065篇 |
2015年 | 44292篇 |
2014年 | 65243篇 |
2013年 | 91942篇 |
2012年 | 111152篇 |
2011年 | 117116篇 |
2010年 | 76073篇 |
2009年 | 75429篇 |
2008年 | 111027篇 |
2007年 | 116449篇 |
2006年 | 119368篇 |
2005年 | 113620篇 |
2004年 | 109025篇 |
2003年 | 102981篇 |
2002年 | 99916篇 |
2001年 | 170076篇 |
2000年 | 174708篇 |
1999年 | 147744篇 |
1998年 | 44524篇 |
1997年 | 39841篇 |
1996年 | 39346篇 |
1995年 | 38157篇 |
1994年 | 34950篇 |
1993年 | 32275篇 |
1992年 | 116669篇 |
1991年 | 112889篇 |
1990年 | 108729篇 |
1989年 | 105092篇 |
1988年 | 97001篇 |
1987年 | 95184篇 |
1986年 | 90035篇 |
1985年 | 85805篇 |
1984年 | 64766篇 |
1983年 | 55184篇 |
1982年 | 33160篇 |
1981年 | 29604篇 |
1979年 | 59560篇 |
1978年 | 41976篇 |
1977年 | 35721篇 |
1976年 | 33281篇 |
1975年 | 35216篇 |
1974年 | 43163篇 |
1973年 | 41290篇 |
1972年 | 38659篇 |
1971年 | 35616篇 |
1970年 | 33452篇 |
1969年 | 31206篇 |
1968年 | 28568篇 |
排序方式: 共有10000条查询结果,搜索用时 9 毫秒
81.
82.
83.
84.
Parupudi V J Sriram Guduru V Rao Nageshwar D Reddy 《Indian journal of gastroenterology》2006,25(1):39-41
Endoscopic clips have been used mainly for control of gastrointestinal (GI) bleeding and occasionally for closure of GI perforations. However, closure of spontaneous esophageal perforation (Boerhaave's syndrome) by clipping has not been reported. We described successful non-surgical closure of spontaneous esophageal perforation by endoscopic clipping in a patient with bilateral pyopneumothorax and septicemia. 相似文献
85.
86.
87.
88.
89.
90.
Harvey A. Siegal PhD ; Paul J. Draus PhD ; Robert G. Carlson PhD ; Russel S. Falck MA ; Jichuan Wang PhD 《The Journal of rural health》2006,22(2):169-173
CONTEXT: Although the nonmedical use of stimulant drugs such as cocaine and methamphetamine is increasingly common in many rural areas of the United States, little is known about the health beliefs of people who use these drugs. PURPOSE: This research describes illicit stimulant drug users' views on health and health-related concepts that may affect their utilization of health care services. METHODS: A respondent-driven sampling plan was used to recruit 249 not-in-treatment, nonmedical stimulant drug users who were residing in 3 rural counties in west central Ohio. A structured questionnaire administered by trained interviewers was used to collect information on a range of topics, including current drug use, self-reported health status, perceived need for substance abuse treatment, and beliefs about health and health services. FINDINGS: Participants reported using a wide variety of drugs nonmedically, some by injection. Alcohol and marijuana were the most commonly used drugs in the 30 days prior to the interview. Powder cocaine was used by 72.3% of the sample, crack by 68.3%, and methamphetamine by 29.7%. Fair or poor health status was reported by 41.3% of the participants. Only 20.9% of the sample felt they needed drug abuse treatment. Less than one third of the sample reported that they would feel comfortable talking to a physician about their drug use, and 65.1% said they preferred taking care of their problems without getting professional help. CONCLUSIONS: Stimulant drug users in rural Ohio are involved with a range of substances and hold health beliefs that may impede health services utilization. 相似文献