首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   93886篇
  免费   28566篇
  国内免费   1059篇
耳鼻咽喉   2370篇
儿科学   2476篇
妇产科学   2225篇
基础医学   1929篇
口腔科学   4989篇
临床医学   25466篇
内科学   23602篇
皮肤病学   3266篇
神经病学   11756篇
特种医学   3463篇
外科学   17272篇
综合类   109篇
现状与发展   40篇
预防医学   13065篇
眼科学   2058篇
药学   811篇
中国医学   5篇
肿瘤学   8609篇
  2024年   739篇
  2023年   5000篇
  2022年   1050篇
  2021年   2610篇
  2020年   5246篇
  2019年   1894篇
  2018年   6745篇
  2017年   7227篇
  2016年   7793篇
  2015年   7871篇
  2014年   10233篇
  2013年   11869篇
  2012年   3390篇
  2011年   3127篇
  2010年   6591篇
  2009年   8912篇
  2008年   3154篇
  2007年   2083篇
  2006年   3271篇
  2005年   1828篇
  2004年   1243篇
  2003年   942篇
  2002年   874篇
  2001年   1791篇
  2000年   1115篇
  1999年   1654篇
  1998年   2038篇
  1997年   1875篇
  1996年   1934篇
  1995年   1673篇
  1994年   1070篇
  1993年   896篇
  1992年   742篇
  1991年   632篇
  1990年   506篇
  1989年   516篇
  1988年   500篇
  1987年   379篇
  1986年   347篇
  1985年   290篇
  1984年   245篇
  1983年   295篇
  1982年   220篇
  1981年   193篇
  1980年   116篇
  1978年   120篇
  1977年   117篇
  1976年   85篇
  1974年   71篇
  1972年   71篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
102.
Although psychoanalysis was the first-choice treatment for premature ejaculation (PE) between 1920 and 1960, hardly any reports on its efficacy have been published. Moreover, a scientific debate about its findings has never been fully developed. The recent progress that has been made in the classification of three different PE syndromes creates a new opportunity for psychoanalytic investigations of men with complaints of PE, distinguished by the actual duration of their intravaginal ejaculation latency time (IELT). The term premature-like ejaculatory dysfunction has been introduced to distinguish men with self-perceived PE at normal and long IELT durations from those men with lifelong, acquired and normal variable PE. Psychoanalytic research may contribute to a better understanding of the consequences of objective early ejaculations on the unconscious mental life of men with the four forms of PE. By integrating neurobiological, clinical and epidemiological data of ejaculatory performance, a revival of psychoanalytic research of PE in the four distinct, classified PE groups, will probably contribute to a deeper insight in to the unconscious mental life of men affected by PE.  相似文献   
103.
104.
105.
106.
107.
108.
109.
The purpose of this study was to investigate radiographic measurements in a cohort of patients with juvenile hallux valgus (with a hallux valgus angle > 15 degrees ) using standardized weightbearing x-rays compared with an age-matched control group. First metatarsal protrusion distance, metatarsus primus adductus angle, metatarsus adductus, first metatarsal cuneiform angle, calcaneal inclination angle, and talocalcaneal angles were assessed with discriminant functional analysis. A total of 37 sets of data were analyzed from patients with a mean age of 13.45 +/- 1.75 years. The study identified 2 significant components of juvenile hallux valgus: a positive first metatarsal protrusion distance (P <.001) and metatarsal primus adductus angle (P = .002). Discriminant functional analysis was then used to determine the best predictors of juvenile hallux valgus. This analysis allowed only 1 variable, metatarsal protrusion distance, as a predictor of whether juvenile hallux valgus was present (P < .001), with 94.3% accuracy. This study showed that a positive metatarsal protrusion distance is a significant component of juvenile hallux valgus.  相似文献   
110.
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   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号