全文获取类型
收费全文 | 704808篇 |
免费 | 49861篇 |
国内免费 | 1296篇 |
专业分类
耳鼻咽喉 | 9166篇 |
儿科学 | 23268篇 |
妇产科学 | 17603篇 |
基础医学 | 110400篇 |
口腔科学 | 19954篇 |
临床医学 | 63752篇 |
内科学 | 134308篇 |
皮肤病学 | 16160篇 |
神经病学 | 49427篇 |
特种医学 | 25737篇 |
外国民族医学 | 76篇 |
外科学 | 104460篇 |
综合类 | 14817篇 |
现状与发展 | 2篇 |
一般理论 | 160篇 |
预防医学 | 51387篇 |
眼科学 | 16318篇 |
药学 | 53942篇 |
3篇 | |
中国医学 | 2359篇 |
肿瘤学 | 42666篇 |
出版年
2019年 | 5430篇 |
2018年 | 7857篇 |
2017年 | 6104篇 |
2016年 | 6818篇 |
2015年 | 7548篇 |
2014年 | 10260篇 |
2013年 | 15377篇 |
2012年 | 20488篇 |
2011年 | 21483篇 |
2010年 | 12717篇 |
2009年 | 11929篇 |
2008年 | 19986篇 |
2007年 | 21503篇 |
2006年 | 21894篇 |
2005年 | 20435篇 |
2004年 | 19992篇 |
2003年 | 18946篇 |
2002年 | 18453篇 |
2001年 | 36325篇 |
2000年 | 36895篇 |
1999年 | 30378篇 |
1998年 | 7876篇 |
1997年 | 6662篇 |
1996年 | 6969篇 |
1995年 | 6627篇 |
1994年 | 6097篇 |
1993年 | 5589篇 |
1992年 | 22968篇 |
1991年 | 22926篇 |
1990年 | 22311篇 |
1989年 | 22076篇 |
1988年 | 20038篇 |
1987年 | 19422篇 |
1986年 | 18467篇 |
1985年 | 17305篇 |
1984年 | 12698篇 |
1983年 | 10742篇 |
1982年 | 5921篇 |
1979年 | 11518篇 |
1978年 | 8129篇 |
1977年 | 6833篇 |
1976年 | 6594篇 |
1975年 | 7269篇 |
1974年 | 8498篇 |
1973年 | 8141篇 |
1972年 | 7658篇 |
1971年 | 7127篇 |
1970年 | 6877篇 |
1969年 | 6306篇 |
1968年 | 5781篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
V F Saenko G D Babenkov V I Smorzhevski? S D Gro?sman V A Gubkin S B Virchenko E D Furmanenko A N Bury? 《Klinichna khirurhiia / Ministerstvo okhorony zdorov'ia Ukra?ny, Naukove tovarystvo khirurhiv Ukra?ny》1990,(8):1-5
In the experiment on dogs and in patients with duodenal ulcer disease, it was established that the regulation of acid production besides the vagal nerves was mediated by the intragastric gastrin transport with the blood flow. A method of preoperative diagnosis of the intensity of intragastric blood flow permitting to define more accurately the indications for the choice of a method for surgical treatment has been developed. Supplementation of the selective proximal vagotomy with circular mucosectomy at the boundary between the antrum and body of a stomach enhances the effectiveness of operation due to reduction of the antral gastrin influence on the acid-producing zones of the stomach. 相似文献
992.
993.
The results of resection of the liver in repeated operations on patients with parasitic disease of the liver are discussed. Operations were conducted on 22 patients with alveococcosis and 7 patients with echinococcosis. By means of the method of atypical liver resection radical operations were performed on 20 patients (69%) and palliative resections of the liver in 9 patients (31%). The palliative resections were combined with cryodestruction of the remaining parasitic tissue, which improved the therapeutic effect significantly and prolonged the patients' survival. The volume of the resection ranged from a segment to one half of the liver. The fatality rate was 6.8%. 相似文献
994.
995.
996.
T Adachi N Kitamura M Otaki T Miki Y Fukushima A Yamaguchi T Minoji H Tamura 《Kyobu geka. The Japanese journal of thoracic surgery》1990,43(5):393-396
Although the cause varies widely, we recently experienced a case of constrictive pericarditis of which cause seemed to be traumatic as described below. The patient was a 62-year-old man having a history of epigastric trauma about 20 years ago. Since then, palpitation appeared and he was recently hospitalized in our department for the purpose of receiving an operation under the diagnosis of constrictive pericarditis. At operation, a hematoma was found in the pericardial region, which was considered to have been caused by trauma in the past. Less reports have so far been available concerning trauma-induced constrictive pericarditis and this case thus seemed to be of rarity as well. 相似文献
997.
Organ specific ESR features in mouse main organs and ESR application to the model of pancreatic disorders 总被引:1,自引:0,他引:1
A Nonaka T Manabe K Tamura N Asano K Imanishi K Yamaki T Tobe 《Nihon Geka Gakkai zasshi》1990,91(2):169-173
Nine main organs in the mouse were studied by ESR spectroscopy at 77K. Manganese ions were readily detected in the pancreas, small intestine, stomach and kidney. In particular, the pancreas gave strong ESR signals for the transition metal, suggesting that Mn(II) plays an important role in pancreatic function. All organs reveal different ESR spectra indicating organ specificity. C-centered radical, R-OO radical and C0Q10 or ascorbate radical are stable in the tissue. In the brain, heart and pancreas, N-centered radical heme-NO adduct was detected at 6 and 24 h after excision since common process is involved in tissue degeneration and ESR is sensitive to proteolysis and necrosis of tissues. In endotoxemia and/or CDE-diet-induced pancreatic lesions, R-OO radical and Mn(II) ion were detected in the signal at 77K. By the spin-trapping method (DMPO) at 25 degrees C, DMPO-OH adduct and 3-Line and 6-Line were detected in CDE diet-induced acute pancreatitis. These results suggest that damaged pancreatic tissues are in a highly oxidative environment that probably contains oxygen radicals, and that free radicals are considered to play an important role in the development of pancreatic lesions. 相似文献
998.
T Takatorige K Tatara K Kuroda N Nakanishi C Nishigaki E Okamoto N Nishi Y Nakagawa C Rin F Shinsho 《[Nihon kōshū eisei zasshi] Japanese journal of public health》1990,37(4):255-262
This study was done to identify factors affecting present hospitalization versus home care in 4,578 elderly subjects representing 87.1% of the elderly population living in S. city near Osaka. Subjects or their families were asked by interviews regarding the age of the subjects, the kind of persons living together in the family unit, the kind of housing, the number of rooms in the family dwelling, and health conditions. Subjects were also asked whether he or she could walk unassisted and whether home care would be preferred in case of an illness. Among the 153 hospitalized subjects, ability to walk, age, and the number of rooms were all significant factors, in decreasing order. Among the 1,193 persons who preferred home care in case of an illness, the number of rooms, age, ability to walk, and the size of the family unit were all significant factors, in decreasing order. Among subjects who could not walk unassisted, the number of rooms was the main factor determining their admission and not preferring home care if their condition worsened. Thus, although the ability to walk is the major factor among the factors we investigated, housing conditions are also important if home care is to be possible. 相似文献
999.
J N Nankani M Northfield Y M Beran P D Richardson 《Current medical research and opinion》1990,12(3):198-206
An open, multi-centre, general practice study was carried out in 1661 asthmatic patients to assess the efficacy, in terms of symptom relief and changes in lifestyle, of budesonide and to record objective lung function changes and any adverse events. After a 1-week run-in period on any pre-trial anti-asthma medication, patients received either 200 micrograms or 400 micrograms budesonide twice daily by metered dose inhaler for 4 weeks. Peak expiratory flow rate (PEFR) was measured by the doctor on entry, after the run-in, and at the end of the study and patients were asked to complete diary cards on a daily basis to record compliance, bronchodilator usage and the severity of cough, wheeze and sleep disturbance, and weekly to record 5 lifestyle assessments, e.g. physical activity. Analysis of data from the clinic visits and 1375 completed diary cards showed that PEFR increased significantly from 321 +/- 3 l/min at the end of the run-in to 368 +/- 3 l/min at the end of the trial; 77% of patients had an improved PEFR. Bronchodilator use decreased significantly from 4.2 +/- 0.1 times/day during the run-in period to 3.0 +/- 0.1 times/day at the end of the study; 65% of patients used less bronchodilator. Significant improvements were recorded in all the symptoms and lifestyle indices monitored; 76% of patients improved in at least 5 of the 11 assessments. Treatment-emergent adverse events occurred in 103 (6%) of patients: none was classified as serious or unexpected. No sub-group of patients was identified in which the results were at variance from the full sample. It is concluded that budesonide improves patients' lifestyle and ability to carry out normal activities, as well as improving PEFR and reducing bronchodilator use, in mild to moderately severe asthmatics treated in general practice. 相似文献
1000.