全文获取类型
收费全文 | 4262篇 |
免费 | 386篇 |
国内免费 | 48篇 |
专业分类
耳鼻咽喉 | 14篇 |
儿科学 | 182篇 |
妇产科学 | 67篇 |
基础医学 | 401篇 |
口腔科学 | 184篇 |
临床医学 | 671篇 |
内科学 | 738篇 |
皮肤病学 | 324篇 |
神经病学 | 444篇 |
特种医学 | 233篇 |
外科学 | 447篇 |
综合类 | 135篇 |
一般理论 | 3篇 |
预防医学 | 297篇 |
眼科学 | 29篇 |
药学 | 340篇 |
1篇 | |
中国医学 | 9篇 |
肿瘤学 | 177篇 |
出版年
2023年 | 19篇 |
2022年 | 14篇 |
2021年 | 58篇 |
2020年 | 60篇 |
2019年 | 71篇 |
2018年 | 92篇 |
2017年 | 93篇 |
2016年 | 89篇 |
2015年 | 89篇 |
2014年 | 115篇 |
2013年 | 160篇 |
2012年 | 177篇 |
2011年 | 225篇 |
2010年 | 186篇 |
2009年 | 160篇 |
2008年 | 197篇 |
2007年 | 205篇 |
2006年 | 178篇 |
2005年 | 164篇 |
2004年 | 143篇 |
2003年 | 151篇 |
2002年 | 147篇 |
2001年 | 137篇 |
2000年 | 125篇 |
1999年 | 135篇 |
1998年 | 109篇 |
1997年 | 112篇 |
1996年 | 81篇 |
1995年 | 80篇 |
1994年 | 56篇 |
1993年 | 67篇 |
1992年 | 85篇 |
1991年 | 77篇 |
1990年 | 73篇 |
1989年 | 88篇 |
1988年 | 81篇 |
1987年 | 67篇 |
1986年 | 65篇 |
1985年 | 71篇 |
1984年 | 50篇 |
1983年 | 36篇 |
1982年 | 24篇 |
1981年 | 18篇 |
1980年 | 28篇 |
1979年 | 20篇 |
1978年 | 21篇 |
1977年 | 28篇 |
1976年 | 19篇 |
1975年 | 18篇 |
1973年 | 12篇 |
排序方式: 共有4696条查询结果,搜索用时 46 毫秒
1.
2.
The midwifery art has emphasised the uniqueness of human beings throughout its Nordic history. The educated Nordic midwife has in the last decade celebrated several hundred years of memories. This article studies how the key ideas of the midwifery art and patterns of ideas become evident in the zeitgeist from the beginning of the 19th century to the millennium in the Nordic countries. The legacy and pattern of ideas of the art of midwifery are interpreted in relation to the texts of the selected historical sources and based on Ricoeur's phenomenological-hermeneutic approach to the text and further to the dedication of understanding and interpretation. The historical sources refer to unprinted primary sources from historical archives and printed secondary and tertiary sources. The patterns of ideas include a tripartite whole: the true cultivation of the head, the philosophy and aesthetics of the hand, the strength of the heart and the drive of calling. These ideas open for unique visions and attest to the evident in modern midwives. Today's midwives have academic training with examinations, and the education is based on scientific evidence. The midwife profession is authorised by the state and supervised by the authorities. 相似文献
3.
4.
ME BURGE AM JOSHUA CM McNEIL R HUI MJ BOYER R ABRAHAM 《Asia-Pacific Journal of Clinical Oncology》2005,1(1):47-52
Background: Pemetrexed and cisplatin have recently been shown to significantly improve survival compared with cisplatin alone. However, there are only limited data reflecting teaching hospital experience outside a clinical trial. Pemetrexed has only been available in Australia on a restricted basis since 2002. We reviewed our experience of patients treated on the Australian ‘Special Access Scheme’ at three major thoracic oncology units. Methods: Charts were reviewed for all patients enrolled on the scheme. Data was extracted on age, World Health Organization (WHO) performance status, histology, prior therapy, time from diagnosis to starting pemetrexed, chemotherapy (pemetrexed alone or with a platinum), cycle number, response rate, actuarial progression‐free and overall survival. Doses were cisplatin 75 mg/m2 or carboplatin AUC = 5 and pemetrexed 500 mg/m2 every 21 days. Results: 52 patients (32 male and 20 female) were reviewed. Median age was 58 years and 88% were WHO 0–1. Histology included 54% epithelial, 17% biphasic (epithelial and sarcomatoid) and 21% undefined. The median time from diagnosis to administration of pemetrexed was 145 days. Sixty‐five percent had minimal surgical intervention with video assisted thoracoscopy, pleurodesis and biopsy, while 19% had received prior palliative radiation. Seventy‐one percent were chemotherapy naïve, the remaining 29% having received previous platinum and/or gemcitabine regimens. Twenty‐three percent had pemetrexed alone, 35% in combination with carboplatin and 42% with cisplatin. The median number of cycles was 4 (range 1–13). The response rate was 33%. No toxicity was observed in 20% grade 3–4 toxicity in 10% (majority nausea/vomiting). The median progression‐free and overall survival times from starting pemetrexed were 184 days and 298 days, respectively. Conclusions: Pemetrexed‐based regimens are safe and effective in a community setting in malignant mesothelioma. 相似文献
5.
6.
Pain management in ambulatory surgery. 总被引:1,自引:0,他引:1
Damon Kamming Frances Chung Donna Williams Brid M McGrath Bruna Curti 《Journal of PeriAnesthesia Nursing》2004,19(3):174-182
Successful ambulatory surgery is dependent on analgesia that is effective, has minimal adverse effects, and can be safely managed by the patient at home after discharge. A number of studies have identified that the provision of effective postoperative analgesia is inadequate for a significant proportion of patients. The following discussion details the current available analgesic options for ambulatory surgery patients and the rationale for their use. Preemptive analgesia should be given to all patients unless there are specific contraindications. Consideration should be given to the use of long-acting oral COX-2 selective nonsteroidal anti-inflammatory drugs (NSAIDs) and long-acting oral opioids to treat postoperative pain. A standardized multimodal postdischarge analgesic regimen tailored to the patient's expected postoperative pain levels should be prescribed. Patient follow-up by telephone questionnaire will confirm those surgical procedures that result in mild or moderate-to-severe postoperative pain and the effectiveness of treatment plans. 相似文献
7.
8.
CM Reid M. Nelson P. Beckinsale P. Ryan LMH Wing LJ Beilin MA Brown GLR Jennings CI Johnston J. Marley JJ McNeil TO Morgan J. Shaw ID Steven MJ West 《Clinical and experimental pharmacology & physiology》1997,24(5):370-373
1. The present study aimed to determine the feasibility of conducting a 5 year cardiovascular outcome trial of the treatment of 6000 elderly hypertensive patients in Australian general practices. 2. General practitioners (GPs) were invited to participate by mail and personal follow-up. Patient records were reviewed to identify subjects for a blood pressure (BP) screening programme. Blood pressure was measured on three occasions and eligible subjects were included if the average BP was 160 mmHg systolic or 90 mmHg diastolic if systolic BP was 140 mmHg. 3. Seven hundred and forty-one GPs were approached and 89 were enrolled in the study (12% of mail invites and 75% of those receiving a personal contact). In 16 practices where screening was completed, 82 000 records were reviewed to identify 4% patients eligible for screening. Twenty-two per cent of eligible subjects attended screening. Of 1938 subjects screened, 180 (9%) had BP 5=160/90 mmHg. Forty-seven percent of subjects (n = 916) were receiving antihypertensive therapy and 184 (20%) were withdrawn from therapy. One hundred and sixteen (63%) of these subjects had BP return to study entry levels within 6 weeks. Fifty-seven newly diagnosed and 81 previously treated subjects were randomized (7% of the screened population). 4. Based on the high participation rate of GPs, the response rate of patients to attend a BP screening programme and the 7% randomization to screening ratio for entry into the study, the ANBP2 pilot study has demonstrated that it is feasible to recruit subjects from Australian general practices to a cardiovascular outcome trial. 相似文献
9.
L Gonzalez-Lavin J Gu L B McGrath S B Amini A Cernaianu D Graf L DeSandis C Daloisio 《The Journal of thoracic and cardiovascular surgery》1990,99(1):153-160
To assess the efficacy of intrapulmonary balloon counterpulsation in the management of right ventricular failure after right ventriculotomy, we undertook an experimental study in a swine model. To mimic the clinical settings more closely, (1) we left the automatic control of the heart intact (2) did not use cardiopulmonary bypass to support the left side of the heart, and (3) induced right ventricular failure by means of a generous surgical incision (50% to 70% of the anterior wall) of the right ventricle. The criteria set for right ventricular failure were (1) 50% increase in right ventricular end-diastolic pressure, (2) 30% decrease in mean arterial pressure, and (3) 30% decrease in cardiac output. Right ventricular failure was attained in all animals studied: A 230% increase in right ventricular end-diastolic pressure, a 43% decrease in cardiac output, and a 34% decrease in mean arterial pressure were evident after the right ventriculotomy. A specially designed intrapulmonary balloon catheter (Datascope Corp., Oakland, N.J.) was placed into the left pulmonary artery through the right ventricular outflow tract. A Datascope console was used for counterpulsation. Effects of counterpulsation for 40 minutes in a 1:1 mode were assessed after surgical induction of right ventricular failure in 14 swine. Each animal served as its own control. The mean hemodynamic changes are outlined: Right ventricular end-diastolic pressure decreased by 48.9% (p = 0.01). Mean arterial pressure increased by 68.8% (p = 0.01) and cardiac output by 44.2% (p = 0.01). Histologic studies disclosed no morphologic damage to the pulmonary artery or valve in the specimens analyzed. In addition, these results were compared with those in a second group of seven swine in which right ventricular failure was induced by right ventriculotomy and a balloon was placed into the left pulmonary artery but not activated. These results of short-term counterpulsation should be evaluated in a longer term model so as to mimic more closely the clinical setting. If the hemodynamic benefits are duplicated, intrapulmonary balloon counterpulsation should be considered as a simple, effective device when right ventricular failure develops after right ventriculotomy. It effectively improves right ventricular function without damaging the pulmonary artery or valve. 相似文献
10.
Peptide growth factors and wound healing 总被引:10,自引:0,他引:10
M H McGrath 《Clinics in plastic surgery》1990,17(3):421-432
An analysis of peptide growth factors and wound healing should not fail to give credit to its foundations in cancer research. Add the recent advances in peptide chemistry and molecular genetics that have permitted complete definitions and in vivo studies for the first time. The result is an enormous break-through in wound healing research. The potential for understanding and then using the growth factors to enhance healing in the aged or debilitated is incalculable. 相似文献