全文获取类型
收费全文 | 2355594篇 |
免费 | 175919篇 |
国内免费 | 3337篇 |
专业分类
耳鼻咽喉 | 32176篇 |
儿科学 | 76157篇 |
妇产科学 | 62903篇 |
基础医学 | 349340篇 |
口腔科学 | 63910篇 |
临床医学 | 212421篇 |
内科学 | 458852篇 |
皮肤病学 | 51812篇 |
神经病学 | 186065篇 |
特种医学 | 88310篇 |
外国民族医学 | 489篇 |
外科学 | 355371篇 |
综合类 | 47752篇 |
现状与发展 | 12篇 |
一般理论 | 863篇 |
预防医学 | 183811篇 |
眼科学 | 54571篇 |
药学 | 175718篇 |
11篇 | |
中国医学 | 4586篇 |
肿瘤学 | 129720篇 |
出版年
2021年 | 19098篇 |
2019年 | 19670篇 |
2018年 | 27222篇 |
2017年 | 20477篇 |
2016年 | 22878篇 |
2015年 | 25805篇 |
2014年 | 36301篇 |
2013年 | 54303篇 |
2012年 | 75100篇 |
2011年 | 79829篇 |
2010年 | 47347篇 |
2009年 | 44804篇 |
2008年 | 75028篇 |
2007年 | 79909篇 |
2006年 | 80681篇 |
2005年 | 78189篇 |
2004年 | 74782篇 |
2003年 | 72126篇 |
2002年 | 69741篇 |
2001年 | 108974篇 |
2000年 | 111682篇 |
1999年 | 93718篇 |
1998年 | 27108篇 |
1997年 | 23778篇 |
1996年 | 24139篇 |
1995年 | 22803篇 |
1994年 | 20965篇 |
1993年 | 19786篇 |
1992年 | 72146篇 |
1991年 | 70225篇 |
1990年 | 68544篇 |
1989年 | 65820篇 |
1988年 | 60439篇 |
1987年 | 59247篇 |
1986年 | 55384篇 |
1985年 | 53127篇 |
1984年 | 39412篇 |
1983年 | 33507篇 |
1982年 | 19946篇 |
1979年 | 35975篇 |
1978年 | 25743篇 |
1977年 | 21321篇 |
1976年 | 20409篇 |
1975年 | 21916篇 |
1974年 | 26255篇 |
1973年 | 24911篇 |
1972年 | 23273篇 |
1971年 | 22116篇 |
1970年 | 20327篇 |
1969年 | 19384篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
911.
912.
Facial reanimation after acoustic neuroma excision is currently accomplished using a variety of surgical techniques. A multi-institutional survey of patient perceptions of facial reanimation success was accomplished by mailing a questionnaire to 809 randomly selected members of the Acoustic Neuroma Association. Four hundred sixty patients who underwent 296 reanimation procedures responded. Facial to hypoglossal nerve anastomosis, tarsorrhaphy, and upper eyelid implants were most frequently performed. The patient's estimations of initial deficit, spontaneous recovery, and overall satisfaction with the reanimation procedures are discussed. 相似文献
913.
914.
A prospective study of 17 cases of microsurgical reversal of tubal sterilization by a combined approach of laparoscopy and minilaparotomy was performed. Inclusion criteria included age less than 43; weight less than ideal body weight plus 20%; documentation of ovulation; 2 cm of proximal oviduct on hysterosalpingography; and a normal semen analysis or postcoital test. A comparison group of the 5 cases of sterilization reversal performed by a standard inpatient technique during the same period was analyzed. The study technique was performed on an outpatient basis in 15 of the 17 cases, 12 patients (71%) conceived 13 intrauterine pregnancies, one ectopic pregnancy occurred, and total patient costs and time until return to work were significantly less with the study versus standard technique. 相似文献
915.
Most authors consider the principal advantage of FG anastomoses (compared to microsurgical anastomoses) to be shorter operating time, reduced surgical trauma to oviduct stumps, and absence of tissue ischemia. These features promote reparative regeneration and decrease adhesion formation, resulting in complete recanalization of fallopian tubes. To date, the majority of work on FG is confined to the experimental development of surgical techniques. Investigations in reconstructive gynecological surgery are quite uncommon. The physical properties of FG and the positive results of available experimental studies suggest that further development of surgical techniques using FG in obstetrics and gynecology is worthwhile. 相似文献
916.
Lipid metabolism and hyperandrogenism. 总被引:1,自引:0,他引:1
R A Wild 《Clinical obstetrics and gynecology》1991,34(4):864-871
Hyperandrogenism and lipid metabolism were shown to be related intimately. Any discussion of the nature of their relationship must include other clinical and metabolic variables such as hyperinsulinemia and UBO. Despite the many correlations among each of these factors, the appropriate sequence in the pathogenesis of these conditions has not been defined. Do conditions that result in insulin resistance (e.g., genetic defects, insulin receptor antibodies, and obesity) also lead to the development of hyperandrogenemia by direct or indirect ovarian stimulation by insulin? Does hyperandrogenism of ovarian or adrenal origin cause abnormal upper body fat distribution, in turn leading to lipid abnormalities and insulin resistance? Regardless of the issue of mechanism of causality, women with hyperandrogenism are thought to be at greater risk for cardiovascular morbidity and mortality than their normoandrogenic counterparts. These women often are obese, hypertensive, and sedentary; ingest diets high in saturated fats; and have glucose intolerance and/or insulin resistance. All these abnormalities are well known independent risk factors for the development of lipid abnormalities and cardiovascular disease. Whether hyperandrogenism is a secondary consequence of any of these or whether it is an independent contributor to lipid aberrations requires future study. Treatment strategies for hyperandrogenic women, however, should not only be directed toward alleviation of the cosmetic problem of hirsutism but also toward the prevention and treatment of cardiovascular morbidity using modalities aimed at eradicating hyperinsulinemia, hypertension, and dyslipidemia. These modalities should include modifications in diet, exercise, and weight in addition to pharmacologic and/or surgical manipulation. Weight reduction will reduce many cardiovascular risk factors. Obesity is easier to target because of the many risk factors that result in it.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
917.
G C Conoscenti S Alberico P Bogatti A Maieron L Fischer Tamaro C Gigli 《Minerva ginecologica》1991,43(12):549-553
The Authors examine the correlation between hypertensive disorders of pregnancy and fetal growth. The results of a study of 342 pregnancies, confirm a significant correlation between hypertension and fetal growth retardation. These findings, so evident in moderate and severe hypertension, have also been confirmed in cases of mild hypertension. The medical treatment also in the pregnancies with mild hypertension, and a larger utilisation of operative deliveries, determined a decrease in perinatal mortality and morbidity. 相似文献
918.
919.
920.
T. A. Creagh P. A. McLean M. G. Donovan J. J. Walshe D. M. Murphy 《Transplant international》1993,6(1):39-41
Reluctance to use kidneys from older donors (>50 years of age) is based on reports of inferior results. We reviewed our experience with 45 kidneys transplanted from older donors. Primary nonfunction, immediate graft function, and 1-, 2- and 3-year graft survival rates were similar to those obtained with kidneys transplanted from donors aged between 20 and 40 years. Renal function at 1 year (as measured by serum creatinine) was poorer in kidneys from older donors. No beneficial effect with respect to graft survival was noted with cyclosporin therapy compared to conventional immunosuppression; however, the numbers are small. We conclude that kidneys from older donors are a valuable source for transplantation. 相似文献