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   1356114篇
  免费   113482篇
  国内免费   6396篇
耳鼻咽喉   16837篇
儿科学   43656篇
妇产科学   37042篇
基础医学   185842篇
口腔科学   36489篇
临床医学   123580篇
内科学   281388篇
皮肤病学   32047篇
神经病学   111862篇
特种医学   55823篇
外国民族医学   274篇
外科学   211760篇
综合类   32140篇
现状与发展   2篇
一般理论   451篇
预防医学   109265篇
眼科学   28394篇
药学   94652篇
  5篇
中国医学   2233篇
肿瘤学   72250篇
  2018年   13687篇
  2017年   10891篇
  2016年   13143篇
  2015年   14679篇
  2014年   20453篇
  2013年   30528篇
  2012年   37388篇
  2011年   40109篇
  2010年   24965篇
  2009年   24476篇
  2008年   37411篇
  2007年   39949篇
  2006年   41020篇
  2005年   39633篇
  2004年   37846篇
  2003年   36878篇
  2002年   34821篇
  2001年   66250篇
  2000年   68084篇
  1999年   56788篇
  1998年   16940篇
  1997年   15199篇
  1996年   16197篇
  1995年   16403篇
  1994年   15225篇
  1993年   14265篇
  1992年   47223篇
  1991年   45859篇
  1990年   44095篇
  1989年   41935篇
  1988年   38863篇
  1987年   38160篇
  1986年   35955篇
  1985年   34757篇
  1984年   26466篇
  1983年   22203篇
  1982年   13937篇
  1981年   12537篇
  1980年   11804篇
  1979年   23616篇
  1978年   17143篇
  1977年   14470篇
  1976年   13248篇
  1975年   13767篇
  1974年   16157篇
  1973年   15452篇
  1972年   14220篇
  1971年   13082篇
  1970年   11932篇
  1969年   11136篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
993.
Nurses have a long history of caring for clients with chronic mental illness. A primary treatment modality used with these clients is supportive psychotherapy. Often this approach is not well understood, even by those who purport to practice it. While supportive therapy tends not to enjoy the prestige associated with other forms of individual psychotherapy, the author contends that supportive psychotherapy can be an interesting and challenging treatment modality for working with clients with chronic mental illness.  相似文献   
994.
Surgical intervention may be necessary for some patients with specific pathology or derangement of the temporomandibular joint as part of an overall management protocol. The current literature discusses the efficacy of arthroscopy, the treatment of the difficult problem of ankylosis, and the use of implants and autogenous and allogenic materials to replace the disk.  相似文献   
995.
A longitudinal study was conducted to investigate changes in women's mental and physical health around the time of childbirth, and to determine whether health was related to length of maternity leave. Thirty-seven married, employed first-time mothers completed questionnaires during pregnancy, and again at 6 weeks, 3 months, and 6 months postpartum. Results showed that, from pregnancy to the 6th postpartum month, the number of days that mothers were ill because of infections steadily increased. In addition, depressive symptoms for new mothers rose from pregnancy to the 6th week postpartum, and declined thereafter. For women who did not return to work during the period of the study, a significant decline in depressive symptoms was observed from the prenatal period through the 6th postpartum month. These findings demonstrate significant changes in mental and physical health for this group of first-time mothers.  相似文献   
996.
Pulse cyclophosphamide for severe neuropsychiatric lupus.   总被引:5,自引:0,他引:5  
We studied the effect of parenteral pulse cyclophosphamide therapy in nine patients with active systemic lupus erythematosus and severe central nervous system involvement. Seven patients had focal neurological deficits and/or seizures associated with abnormalities on cerebrospinal fluid analysis and/or magnetic resonance imaging. Two patients had organic brain syndrome with psychosis and normal cerebrospinal fluid and/or magnetic resonance imaging analysis. Six patients were unresponsive to treatment with high dose corticosteroid. Cyclophosphamide, 0.75-1.0 g/m2 body surface area, was administered intravenously every month for at least 2 months. Eight patients had a complete recovery or recovered with minor residuals. Cyclophosphamide was well tolerated with few side effects. We conclude that parenteral pulse cyclophosphamide is an effective adjunctive therapy for the management of patients with active systemic lupus erythematosus and central nervous system symptoms.  相似文献   
997.
Twenty-two days after administration by intravenous bolus, of 50 mg of adriamycin to several patients we found concentrations of adriamycin and adriamycinol of the order of 100 pcg/ml. In theory, however, with a terminal half-life of 30 h, the plasma levels of adriamycin and adriamycinol should be close to 0.1 pcg/ml. Further pharmacokinetic investigation was therefore necessary. We have retained for this study nine male patients, aged between 53 and 69 years who received 25 to 50 mg of adriamycin by slow intravenous injection. The HPLC method permitted the detection of 50 pcg/ml of adriamycin and adriamycinol, with the possibility of monitoring their elimination during 120 h (and in one case during 160 h). The terminal half-lives of elimination estimated in 8 patients were respectively 110 +/- 52 h for adriamycin and 92 h 50 min +/- 43 h for adriamycinol. Surface ratios under adriamycinol curves against calculated adriamycin was 1.10 +/- 0.26. Plasma levels found during the To in certain patients correspond to the end of the drug elimination of the previous treatment. It is difficult with a half-life to 110 h to predict the effects of residual concentrations of adriamycin and adriamycinol.  相似文献   
998.
Gonadotrophin-releasing hormone agonists (GnRHAs) were investigated as contraceptive agents from the late 1970's to the mid-1980's. They were abandoned as they appeared to offer no advantage over conventional combination-type oral contraceptives (COCs). This conclusion appears to be incorrect. We propose here a contraceptive regimen of a depot formulation of a GnRHA plus add-back estrogen and intermittent progestogen. The dose of add-back sex-steroids is substantially less than that in COCs; this reduction in sex-steroids should lead to a major reduction in lifetime breast cancer occurrence.  相似文献   
999.
Handcuff neuropathies   总被引:1,自引:0,他引:1  
D A Stone  R Laureno 《Neurology》1991,41(1):145-147
Compressive neuropathy due to tight application of handcuffs occurred in 5 patients. The superficial radial nerve was affected in 8 hands and the median nerve in two. Neurologic deficits persisted as long as 3 years after handcuffing. Nerve conduction studies helped to exclude malingering and other diagnoses. All patients had been intoxicated when handcuffed or had been arrested with force. The handcuff mechanism, which allows accidental overtightening after application, is an unrecognized factor in these neuropathies.  相似文献   
1000.
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