全文获取类型
收费全文 | 3112篇 |
免费 | 177篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 37篇 |
儿科学 | 96篇 |
妇产科学 | 54篇 |
基础医学 | 500篇 |
口腔科学 | 68篇 |
临床医学 | 214篇 |
内科学 | 683篇 |
皮肤病学 | 87篇 |
神经病学 | 334篇 |
特种医学 | 109篇 |
外科学 | 241篇 |
综合类 | 9篇 |
预防医学 | 168篇 |
眼科学 | 97篇 |
药学 | 266篇 |
中国医学 | 12篇 |
肿瘤学 | 326篇 |
出版年
2023年 | 25篇 |
2022年 | 52篇 |
2021年 | 94篇 |
2020年 | 61篇 |
2019年 | 51篇 |
2018年 | 85篇 |
2017年 | 51篇 |
2016年 | 67篇 |
2015年 | 73篇 |
2014年 | 118篇 |
2013年 | 115篇 |
2012年 | 196篇 |
2011年 | 235篇 |
2010年 | 149篇 |
2009年 | 94篇 |
2008年 | 215篇 |
2007年 | 222篇 |
2006年 | 234篇 |
2005年 | 219篇 |
2004年 | 223篇 |
2003年 | 176篇 |
2002年 | 170篇 |
2001年 | 25篇 |
2000年 | 12篇 |
1999年 | 29篇 |
1998年 | 34篇 |
1997年 | 25篇 |
1996年 | 25篇 |
1995年 | 28篇 |
1994年 | 22篇 |
1993年 | 22篇 |
1992年 | 20篇 |
1991年 | 17篇 |
1990年 | 9篇 |
1989年 | 12篇 |
1988年 | 11篇 |
1987年 | 8篇 |
1986年 | 4篇 |
1985年 | 10篇 |
1984年 | 7篇 |
1983年 | 5篇 |
1982年 | 7篇 |
1981年 | 4篇 |
1980年 | 7篇 |
1978年 | 7篇 |
1977年 | 5篇 |
1976年 | 3篇 |
1975年 | 3篇 |
1973年 | 3篇 |
1972年 | 3篇 |
排序方式: 共有3301条查询结果,搜索用时 0 毫秒
71.
72.
73.
Mitsuo Okada M.D. Masahide Arita Mitsuo Iida Tsuneyoshi Yao Toshihiro Sakurai Kiyomi Hoshiko Kazuhiro Maeda Yasuhiro Okada Kiyoto Sakamoto 《Journal of gastroenterology》1992,27(2):179-186
A randomized controlled study comparing once-a-day morning and once-a-day bedtime administration of 40 mg famotidine in treating
duodenal ulcers was carried out in 99 Japanese patients. Endoscopic examinations were performed at the baseline and repeated
at 3-week intervals until healing was confirmed. Eighty-two patients fulfilled the evaluation criteria (38 in the morning
group and 44 in the bedtime group). In 13 of these patients the antisecretory effects of these regimens were also assessed
by 24 h intragastric pH monitoring. The healing rates were 66% after 3 weeks and 95% after 6 weeks in the morning group, and
57% after 3 weeks and 80% after 6 weeks in the bedtime group. The differences were insignificant between the two groups, but
there was a higher healing rate tendency after 6 weeks in the morning group (0.05<P<0.10). Regarding pain subsidence, there
were no significant differences between the two groups. Both treatments were significantly superior to the controlgroup in
increasing 24 h intragastric pH. The morning regimen was significantly superior to the bedtime regimen in suppression of daytime
acidity. On the contrary, the bedtime regimen was significantly superior to the morning regimen in suppression of nocturnal
acidity. These findings suggest that suppression of nocturnal acidity is important but not essential to promote duodenal ulcer
healing and suppression of daytime acidity is equally important. Thus, once-a-day morning administration of 40 mg famotidine
seems to be at least as effective as once-a-day bedtime administration of 40 mg famotidine in treating duodenal ulcers. 相似文献
74.
Tohru Murayama M.D. Shion Imoto M.D. Mitsuhiro Ito M.D. Keiko Matsushita M.D. Sachiko Matozaki M.D. Toshitaro Nakagawa M.D. Yoshihiro Kanbara M.D. Norio Kono M.D. Terumasa Sashikata M.D. 《The American journal of gastroenterology》1992,87(10):1503-1504
We report a case of fibromatosis, soft tissue tumors that are benign histologically, but exhibit behavior intermediate between benign and malignant diseases. Mesenteric fibromatosis grows vigorously without a general inflammatory reaction, and its symptoms are the result of obstruction and/or compression of the intestine. However, in our case, the general inflammatory reactions of fever and C-reactive protein (CRP) elevation was present at an early stage. Because this inflammatory reaction disappeared after surgical resection, it may have been induced by some inflammatory factors produced in the tumor, such as those produced in inflammatory fibrous histiocytoma. We found that computed tomography was useful in the detection of the cause of fever of unknown origin, and suggest that it should be recommended in cases of long-lasting unexplainable fever. 相似文献
75.
Miki Ohta Masahito Kobayashi Kenji Wakiya Sachiko Takamizawa Mamoru Niitsu Takamitsu Fujimaki 《Acta neurochirurgica》2014,156(3):565-569
Background
Microvascular decompression (MVD) has become a well-established surgical procedure for hemifacial spasm (HFS). Before surgery, it is essential to evaluate any possible deformity of the brainstem and establish the precise location of the offending vessels. In the present study of HFS patients we examined coronal sections taken by heavily T2-weighted MR cisternography in addition to routine axial sections, and assessed the usefulness of these images through comparison with intraoperative findings.Methods
Eighty patients with HFS underwent preoperative coronal heavily T2-weighted MR cisternography before microvascular decompression surgery. Three neurosurgeons examined the preoperative axial and coronal MR images and evaluated vessel invagination into the brainstem. The usefulness of coronal sections was assessed statistically by the Mann-Whitney U test.Results
Invagination of the offending vessel into the brainstem was observed in 24 cases (30.0%). In 19 patients, it was predicted preoperatively that compression of the flocculus and brainstem would be required in order to approach the offending vessels. Coronal MR cisternography was significantly more useful in cases with vessel invagination into the brainstem than in cases without invagination.Conclusions
Coronal sections obtained by MR cisternography are able to demonstrate the severity of vessel invagination into the brainstem as well as revealing the presence of the offending vessel. This information is helpful for planning a suitable approach to the root exit zone. 相似文献76.
Hayashi-Sakai Sachiko Sakamoto Makoto Hayashi Takafumi Kondo Tatsuya Sugita Kaito Sakai Jun Shimomura-Kuroki Junko Ike Makiko Nikkuni Yutaka Nishiyama Hideyoshi 《Oral Radiology》2019,35(1):29-34
Oral Radiology - The present study was performed to investigate the mineral density distribution in enamel and dentin for both permanent and primary teeth and to establish the standard density per... 相似文献
77.
78.
Tetsurou Yamamoto Sachiko Minamiguchi Yoshiki Watanabe Jun Tsuji Ryo Asato Toshiaki Manabe Hironori Haga 《Head and neck pathology》2014,8(2):198-203
Kimura disease (KD) affecting an unusual site is a diagnostic challenge. We report herein the case of a 62-year-old Japanese woman who presented with swelling of the epiglottis, resulting in airway narrowing. Microscopically, biopsied and resected specimens both revealed lymphoid proliferation of a reactive immunophenotype, accompanied by vascular proliferation, eosinophilic infiltration, and stromal sclerosis. Adjunctive immunohistochemistry with immunoglobulin E in addition to laboratory and histological findings led us to seriously consider a diagnosis of KD. The patient underwent surgical removal with postoperative steroid therapy and has no evidence of recurrence. Our experience suggests that KD is potentially fatal as well as showing difficulty in the histological diagnosis when occurring in the upper respiratory tract, such as the epiglottis. A literature review disclosed that our case is the 11th case so far reported in this location, and that KD of the epiglottis did not show any male preponderance, as seen in other places. 相似文献
79.
Masatoshi Nakagawa Kazuhisa Ehara Masaki Ueno Tsuyoshi Tanaka Sachiko Kaida Harushi Udagawa 《Surgical endoscopy》2014,28(4):1371-1375